{"title":"Transmitters \u0026 Receiver","description":"\u003cp\u003eWireless systems only work as well as the power behind them. Our Transmitters \u0026amp; Receiver battery collection is built for devices that demand stable, uninterrupted energy in real-time communication and control environments.\u003c\/p\u003e\n\u003cp\u003eFrom industrial automation and remote monitoring systems to AV setups, drones, and specialized wireless equipment, these batteries are chosen to support precise signal handling without drops or delays. When reliability matters, consistent voltage output becomes just as important as capacity — and that’s exactly what this collection focuses on.\u003c\/p\u003e\n\u003cp\u003eYou’ll find replacement batteries suited for a wide range of transmitter and receiver units, including compact handheld devices and integrated professional systems. Each option is selected for dependable performance under continuous use, ensuring your equipment stays responsive when it matters most.\u003c\/p\u003e\n\u003cp\u003eInstead of generic power solutions, this collection is tailored for devices where communication failure is not an option. Whether you’re replacing a failing battery or upgrading for better runtime, these options are built to keep your system stable and responsive.\u003c\/p\u003e\n\u003cp\u003eExplore reliable transmitter and receiver batteries designed for real-world performance, not just specifications on paper.\u003cbr\u003e\u003c\/p\u003e","products":[{"product_id":"sennheiser-eki1029-replacement-battery-24v-300mah-ni-mh","title":"Sennheiser BA1029 Wireless Microphone Replacement Battery 2.4V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser EKI1029 \/ Receiver EKI 1029 — 2.4V Ni-MH Replacement Battery (BA1029)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 300mAh Ni-MH rechargeable battery for the Sennheiser EKI1029 wireless transmitter and receiver system. It replaces OEM part numbers BA1029 and BA 1029. The EKI1029 runs on this cell during live sound, presentation, and broadcast sessions where a stable, rechargeable power source is required.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEKI1029 transmitter and receiver compatibility:\u003c\/strong\u003e\n    Both the transmitter and receiver units in the EKI1029 system draw from the same 2.4V Ni-MH cell format. The shared voltage rail and connector spec mean one battery type covers both halves of the wireless link — no separate cells needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the EKI1029 platform. The BMS accepted charge without fault flags, and the battery held within the expected voltage window across the full discharge curve without premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact cleaning between battery swaps:\u003c\/strong\u003e\n    The EKI1029's battery contacts are small and close-spaced. Residue from Ni-MH cells can build up faster than on lithium systems. Wipe the contacts with a dry cotton swab before fitting a new cell — oxidation on these terminals causes voltage drop that the system reads as a low battery.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter dropping signal mid-broadcast on a freshly installed battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EKI1029 transmitter combines RF output and DSP processing in a single current draw. Under peak load — during active transmission with signal processing engaged — the combined draw can spike above what a partially depleted or poorly seated Ni-MH cell will deliver. The BMS reads this as an under-voltage condition and cuts power momentarily, dropping the RF link. The fix is to confirm the battery is fully charged before the session starts and that it is seated firmly so contact resistance is near zero.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not syncing after swapping the transmitter battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the transmitter loses power during a battery swap, some EKI1029 system configurations drop the RF handshake entirely rather than resuming it on power restore. The receiver holds the last sync state but will not re-establish the link automatically if the transmitter comes back on a different power cycle. Power the receiver off, then back on after the transmitter has fully booted. This forces a fresh sync sequence and restores the wireless link.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861101146,"sku":"BWCS-SBA102SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861133914,"sku":"BWCS-SBA102SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306861166682,"sku":"BWCS-SBA102SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBA102SL_1.webp?v=1777768791"},{"product_id":"shure-adx1m-replacement-battery-37v-500mah-li-polymer","title":"Shure ADX1M Replacement Battery 3.7V 500mAh 95A24863","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure ADX1M Bodypack Transmitter — 3.7V Li-Polymer Replacement Battery (95A24863 \/ SB910M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 500mAh Li-Polymer battery replaces the internal cell in the Shure ADX1M bodypack transmitter. It also fits the DX1M G57 and DX1M transmitter variants that share the same battery bay and connector. Dimensions are 54.70 × 39.20 × 8.30mm — confirm against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eADX1M and DX1M shared battery platform:\u003c\/strong\u003e\n    These transmitters run the same 3.7V Li-Polymer cell across the ADX1M and DX1M G57 variants. The battery bay dimensions, connector orientation, and BMS handshake protocol are identical, so one cell covers the full group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the ADX1M transmitter under combined DSP and RF transmit load. The BMS held stable across the full discharge curve with no mid-session cutoff tripped by transmit-mode current spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eADX1M contact cleaning after swap:\u003c\/strong\u003e\n    The gold pogo-pin contacts inside the ADX1M battery bay oxidise with repeated cycling. Before fitting a new cell, wipe the contacts with a dry cotton swab. Oxidised contacts raise contact resistance and cause the transmitter to report a false low-battery state immediately after a fresh install.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under combined RF transmit and DSP load on the ADX1M\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ADX1M draws from two loads simultaneously — the RF transmitter stage and the onboard DSP processing the audio signal. At peak combined draw, a degraded or undersized cell will sag below the BMS cutoff threshold before the nominal capacity is depleted. This triggers a shutdown that looks like a dead battery but is actually a voltage floor trip. A healthy 3.7V Li-Polymer cell with a low internal resistance value handles the combined load without sag. If the transmitter shuts off early, check that the replacement cell's open-circuit voltage reads at least 4.1V before install.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver loses sync immediately after ADX1M battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the ADX1M by removing the battery clears the active RF channel handshake stored in the transmitter's working memory. When the new cell is inserted and the transmitter powers up, some Shure receiver units do not automatically re-establish the link — they wait for a manual re-pair command. This is not a battery fault. Power cycle the receiver, then hold the sync button on both units until the channel lock indicator confirms pairing. The transmitter should show a steady RF status LED within a few seconds of a successful handshake.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426154643546,"sku":"BWCS-SDX100SL-1","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426154676314,"sku":"BWCS-SDX100SL-2","price":63.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426154709082,"sku":"BWCS-SDX100SL-3","price":70.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDX100SL_1.webp?v=1779930458"},{"product_id":"shure-adx1-bodypack-transmitter-replacement-battery-37v-1800mah-li-ion","title":"Shure ADX1 Bodypack Replacement Battery 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure ADX1 Bodypack Transmitter — 3.7V Li-ion Replacement Battery (95A24832 \/ SB910)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1800mAh lithium-ion cell replaces the factory battery in the Shure ADX1 bodypack transmitter series. It fits the standard ADX1, the ADX1 Digital Wireless Bodypack, and LEMO 3-Pin variants. Capacity is drawn from the product specification — 6.66Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eADX1 series compatibility:\u003c\/strong\u003e\n    All listed ADX1 variants share the same 3.7V single-cell architecture, physical footprint, and BMS handshake. The connector and cell dimensions (55.60 × 39.30 × 13.80mm) are identical across the standard and LEMO 3-Pin models, so one cell works across all variants in the family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the ADX1's power-on sequence and monitored the BMS negotiation under combined transmit and DSP load. Voltage held stable, the onboard indicator matched actual state-of-charge, and the BMS did not trigger a premature low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact cleaning before install:\u003c\/strong\u003e\n    The ADX1's battery bay contacts are small and corrode easily from skin oils transferred during bodypack handling. Wipe the gold pads with a dry lint-free cloth before seating the new cell — a resistive contact here shows up as a false low-battery reading before actual depletion.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag on the ADX1 under combined transmit and DSP draw\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ADX1 doesn't just transmit RF — it also runs onboard DSP for audio processing simultaneously. That combined load pulls harder on the cell than a simple transmitter would. A degraded or under-spec cell sags below the BMS cutoff threshold under this dual load even when the battery indicator still shows partial charge. This cell is rated to hold voltage across that combined draw without premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver fails to sync after battery swap in the ADX1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Axient Digital receivers holding a link to the ADX1 will drop sync when the transmitter loses power during a battery change. The receiver treats an unplanned power loss differently from a clean shutdown. After fitting the new cell, power the ADX1 on fully, then trigger a manual re-pair from the receiver's RF menu rather than waiting for auto-sync. Once linked, confirm the receiver shows the transmitter's name and RF level — that confirms a clean handshake at the protocol level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426155331674,"sku":"BWCS-SGX130SL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426155364442,"sku":"BWCS-SGX130SL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426155397210,"sku":"BWCS-SGX130SL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SGX130SL_1.webp?v=1779930458"},{"product_id":"ankerwork-m650-replacement-battery-37v-2600mah-li-polymer","title":"AnkerWork M650 Replacement Battery 3.7V 2600mAh C0914B2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAnkerWork M650 — 3.7V Li-Polymer Replacement Battery (C0914B2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2600mAh lithium-polymer battery replaces the internal cell in the AnkerWork M650 wireless microphone transmitter. Part number C0914B2 matches the original specification. It restores power to the transmitter body used in presentations, broadcast, and live performance setups.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM650 transmitter fit:\u003c\/strong\u003e\n    The M650 transmitter runs a single-cell 3.7V Li-Polymer architecture with a compact dual-layer footprint (36.00×36.40×7.80mm×2). The BMS in this unit manages charge termination and low-voltage cutoff — the replacement cell must match the original protection circuit handshake, which C0914B2 does.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the M650's charge and discharge path. The BMS accepted charge termination cleanly at 4.2V, and the low-voltage cutoff triggered at the expected threshold without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eTransmitter storage between shoots:\u003c\/strong\u003e\n    If the M650 sits unused for more than two weeks, discharge the cell to around 50% before storing. Li-Polymer cells stored at full charge above 4.1V for extended periods accelerate internal degradation — this matters more for infrequently used transmitters than for daily-use units.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under combined DSP and transmit load on the M650\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe M650 runs audio DSP and the RF transmit stage simultaneously. This creates brief current spikes that pull the cell voltage below the BMS trip threshold if the cell is aged or cold. A fresh cell with low internal resistance handles these spikes without triggering a cutoff. At temperatures below 10°C, even a healthy Li-Polymer cell sees elevated internal resistance — expect the transmitter to behave as if the battery is lower than the indicator shows.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver loses sync immediately after transmitter battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the transmitter battery clears the active RF session state on some M650 configurations. When power returns, the transmitter broadcasts its pairing signal, but the receiver may not re-acquire it automatically. If the receiver shows no signal after a battery replacement, power-cycle the receiver and let both units complete their startup sequence before checking the link. The connection re-establishes once both devices exchange the pairing handshake at full operating voltage — confirm the transmitter LED shows solid status, not a slow blink.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426155987034,"sku":"BWCS-AKM650SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426156019802,"sku":"BWCS-AKM650SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426156052570,"sku":"BWCS-AKM650SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AKM650SL-1.webp?v=1779930436"},{"product_id":"shure-mxw-handheld-transmitter-replacement-battery-37v-3350mah-li-ion","title":"Shure MXW 3.7V 3350mAh Replacement Battery 95A35233","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure MXW2 Handheld Transmitter — 3.7V Li-ion Replacement Battery (95A35233 \/ SB905)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 3350mAh (12.4Wh) lithium-ion battery fits the Shure MXW Handheld Transmitter and MXW2 Handheld Transmitter. These are rechargeable wireless microphone transmitters used in live sound, broadcast, and AV presentation environments. This cell matches the original OEM part numbers 95A35233 and SB905.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMXW and MXW2 platform fit:\u003c\/strong\u003e\n    Both transmitters share the same battery bay geometry, contact configuration, and BMS handshake protocol. A single cell covers both models — no adapter or wiring change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through full charge-discharge on the MXW2 transmitter body. The BMS accepted the cell without error flags, held the 3.7V nominal rail under active RF transmission load, and reported charge state accurately through the transmitter's onboard indicator.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact surface maintenance on MXW transmitters:\u003c\/strong\u003e\n    The MXW battery contacts are recessed and collect debris from handled transmitters. Oxidation on those contacts raises resistance and triggers false low-battery readings. Wipe the gold contact pads with a dry lint-free cloth each time you swap cells — do not use alcohol on the transmitter-side contacts, as it can strip the conductive coating.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag on the MXW2 under combined RF transmit and DSP load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MXW2 runs active DSP processing alongside the RF transmit stage, and both draw current simultaneously during live transmission. A degraded or partially charged cell can't sustain the combined load, and voltage dips below the BMS cutoff threshold even when the indicator shows a partial charge. This isn't a transmitter fault — it's the cell failing to hold voltage under peak draw. A fresh cell at full charge resolves the sag. If signal cuts persist after fitting a new cell, check that the battery is fully charged to 4.2V before use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver fails to sync after swapping the transmitter battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MXW system stores pairing data in volatile memory on the transmitter side. If the battery drops below the BMS cutoff during a swap — even briefly — the transmitter can lose its sync state with the receiver. The receiver shows the transmitter as unlinked even though the new cell is fully charged. Fix this by running the IR sync procedure again: hold the transmitter's sync button close to the receiver's IR window and follow the on-screen re-pair prompt on the MXW access point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426156675162,"sku":"BWCS-SMW200XL-1","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426156707930,"sku":"BWCS-SMW200XL-2","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426156740698,"sku":"BWCS-SMW200XL-3","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMW200XL-1.webp?v=1779930458"},{"product_id":"shure-mxw-handheld-transmitter-replacement-battery-37v-2600mah-li-ion","title":"Shure MXW Replacement Battery 3.7V 2600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure MXW \/ MXW2 Handheld Transmitter — 3.7V Li-ion Replacement Battery (95A35233 \/ SB905)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2600mAh (9.62Wh) Li-ion replacement battery for the Shure MXW and MXW2 Handheld Transmitters. It slots into the transmitter body and powers the RF transmit stage, DSP processing, and audio conditioning circuitry. If your original battery is failing to hold charge or causing dropouts mid-show, this is the direct replacement using OEM part numbers 95A35233 and SB905.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMXW and MXW2 compatibility:\u003c\/strong\u003e\n    Both transmitters run the same 3.7V cell architecture, share the SB905 battery form factor, and use the same BMS handshake protocol. One replacement covers both units without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through full charge and discharge passes on live MXW hardware. The BMS engaged correctly at low-voltage cutoff, and the transmitter registered a full charge state without any pairing errors or indicator faults on the receiver display.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eTransmitter storage between productions:\u003c\/strong\u003e\n    If the MXW sits unused for more than two weeks, remove the battery before storage. Li-ion cells in transmitters can drift below 3.0V during extended idle — below that threshold, the BMS latches into deep-discharge protection and the unit will not power on until a dedicated recovery charge is applied.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under simultaneous RF transmit and DSP load in the MXW\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MXW draws current from two paths at once — the RF transmit stage and the onboard DSP that handles audio processing and encryption. At peak load, this combined draw can pull the cell voltage down momentarily, even on a freshly charged battery. A cell with any capacity fade will sag past the BMS cutoff threshold and drop the transmitter offline. A fresh 2600mAh cell maintains enough headroom to keep both load paths stable across the full charge cycle. If dropouts occur only during loud passages or rapid gain changes, voltage sag under DSP peak load is the likely cause.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver loses sync immediately after transmitter battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery in the MXW cuts power to the transmitter's RF and memory circuits entirely. Some MXW system configurations treat this as a link loss event and drop the paired channel on the receiver. When you reinstall the battery and power the transmitter back on, the receiver may show no signal or an unlinked status. Initiate a fresh RF channel scan on the receiver, then trigger the transmitter link from the MXW body — this re-establishes the RF handshake. Confirm the receiver shows a steady link indicator before going live.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426157428826,"sku":"BWCS-SMW200SL-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426157461594,"sku":"BWCS-SMW200SL-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426157494362,"sku":"BWCS-SMW200SL-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMW200SL-1.webp?v=1779930458"},{"product_id":"shure-next-2-mxw2x-handheld-microphone-replacement-battery-37v-2600mah-li-ion","title":"Shure neXt 2 MXW2X 3.7V Li-ion Replacement Battery 95A48182","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure neXt 2 MXW2X — 3.7V Li-ion Replacement Battery (95A48182 \/ SB908)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2600mAh lithium-ion cell replaces the OEM battery in the Shure neXt 2 MXW2X Handheld Microphone and MXW2X Handheld Transmitter. It matches the original 9.62Wh energy rating and fits the same battery bay without modification. Swap it in when the original cell no longer holds a full charge through a set or presentation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMXW2X transmitter fit:\u003c\/strong\u003e\n    Both the handheld microphone and transmitter variants share this cell because they run the same 3.7V power rail, connector footprint, and BMS handshake protocol — one battery serves either unit without adaptation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the MXW2X transmitter's power-on sequence and confirmed the BMS accepted the charge profile without triggering a low-voltage lockout or a protection fault during the RF transmit draw spike.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact cleaning before install:\u003c\/strong\u003e\n    The MXW2X battery bay uses spring-loaded gold contacts — any oxidation on those pins breaks the BMS communication path and causes the transmitter to show a false low-battery reading immediately after a fresh swap. Wipe the contacts with a dry cloth before seating the new cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag on the MXW2X during combined RF transmit and DSP draw\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MXW2X pulls simultaneous current for RF transmission and onboard DSP processing. An aged or degraded cell cannot sustain the combined load without the voltage dipping below the BMS cutoff threshold, which the transmitter reads as a dead battery. This replacement cell has sufficient internal resistance headroom to stay above that threshold under peak draw. If the transmitter cuts out mid-transmission, check that the cell is seated fully — a partially engaged contact increases internal resistance and mimics a depleted battery.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not re-syncing after MXW2X battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the MXW2X transmitter loses power — including during a battery swap — some Shure neXt 2 receiver configurations require a manual re-pair before audio resumes. The RF link drops cleanly on power loss, but the receiver may not automatically re-establish the channel assignment. If the receiver shows no signal after you install the new battery, power-cycle the transmitter with the battery fully seated and initiate a sync from the receiver's menu. Confirm the transmitter shows a steady RF indicator, not a blinking one, before checking audio.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426159427674,"sku":"BWCS-SGB908SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426159460442,"sku":"BWCS-SGB908SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426159493210,"sku":"BWCS-SGB908SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SGB908SL-1.webp?v=1779930458"},{"product_id":"shure-mxw1x-replacement-battery-37v-1000mah-li-polymer","title":"Shure MXW1X Compatible Battery 3.7V 1000mAh SB906","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eShure MXW1X \/ MXW6X Series — 3.7V Li-Polymer Replacement Battery (95A47652 \/ SB906)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1000mAh lithium-polymer battery replaces the Shure 95A47652 \/ SB906 cell in the MXW1X and MXW6X wireless transmitter range, including the MXW6X Boundary Microphone and MXW6X Transmitter variants. It fits directly into the original battery bay and works with the onboard fuel gauge and BMS that the MXW platform uses to report charge status to the transmitter and any paired charging station. Capacity is 1000mAh at 3.7V (3.7Wh), matching the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMXW1X and MXW6X platform fit:\u003c\/strong\u003e\n    Both transmitter types share the same battery footprint, connector pinout, and BMS handshake protocol. The MXW charging infrastructure — including the MXW-NODK docking station — reads state-of-charge data directly from the cell's protection circuit. A cell with the wrong BMS will show incorrect charge percentage or fail to initialise in the dock.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the MXW1X transmitter and MXW charging dock. The BMS initialised correctly on first insertion, charge status reported accurately on the dock display, and the protection circuit tripped at the expected low-voltage cutoff without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDock charging contact care:\u003c\/strong\u003e\n    The MXW transmitter charges through spring-loaded pogo pins on the dock. If the battery installs loosely or the pogo pins are oxidised, the dock registers an error rather than beginning a charge cycle. Clean the transmitter's charge contacts with isopropyl alcohol before inserting a new cell — this prevents false dock errors on first charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MXW1X drops signal mid-transmission on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MXW1X draws current from two simultaneous loads: the RF transmit stage and the DSP processing block. On a degraded or counterfeit cell, this combined draw causes a brief voltage sag below the BMS cutoff threshold, which shuts down the transmitter mid-broadcast even when the fuel gauge still shows charge remaining. A genuine 3.7V cell with the correct discharge curve holds voltage flat under this dual load. If dropouts persist after a battery swap, check that the replacement cell's nominal voltage is exactly 3.7V — cells rated 3.6V have a different discharge curve and sag earlier under RF load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver loses sync every time the transmitter battery is swapped\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome MXW system configurations require a re-pair sequence after the transmitter loses power, because the RF link parameters stored in the transmitter's volatile memory are cleared on a full power cycle. This is not a battery fault — it is normal MXW system behaviour when power is interrupted. After fitting the new cell, power on the transmitter and use the Shure Wireless Workbench or the Access Point's web interface to re-associate the transmitter with its assigned channel. Once saved, the link persists through subsequent battery swaps as long as the transmitter is not fully discharged before removal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426159886426,"sku":"BWCS-SGB906SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426159919194,"sku":"BWCS-SGB906SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426159951962,"sku":"BWCS-SGB906SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SGB906SL-1.webp?v=1779930458"},{"product_id":"cerevo-liveshell-x-encoder-replacement-battery-74v-3400mah-li-ion","title":"Cerevo LiveShell X Replacement Battery 7.4V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCerevo LiveShell X Encoder — 7.4V Li-ion Replacement Battery (CDP-LS04A-BAT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 3400mAh Li-ion battery for the Cerevo LiveShell X portable streaming encoder. It slots directly into the LiveShell X and powers the unit during live field broadcasts and multi-platform streaming sessions. Voltage and cell chemistry match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLiveShell X encoder fit:\u003c\/strong\u003e\n    The LiveShell X draws from a single 7.4V Li-ion pack to run its encoding pipeline, wired and wireless uplink circuits, and onboard display simultaneously. This battery meets that combined voltage rail requirement with the correct connector and BMS handshake the encoder expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge and discharge cycle on the LiveShell X. The onboard BMS negotiated correctly, charge acceptance was normal at the standard CC\/CV profile, and the protection circuit tripped cleanly at low-voltage cutoff without triggering a fault state in the encoder firmware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eField storage between events:\u003c\/strong\u003e\n    If the LiveShell X sits unused between broadcast jobs, do not store the battery fully discharged. The encoder's BMS will not recover a cell that has dropped below approximately 2.5V per cell — store at 50–60% state of charge to keep the pack in a recoverable voltage window.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the LiveShell X drops its uplink mid-stream on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe LiveShell X spikes current draw sharply when it activates its cellular or Wi-Fi uplink alongside active encoding — this combined load can exceed 1.5A in short bursts. A battery with elevated internal resistance, whether aged or poorly stored, cannot sustain voltage under that spike and the encoder briefly browns out its radio module. The result looks like a network drop but is actually a voltage sag event. Confirm the replacement cell sits above 7.2V under load using a basic multimeter across the battery contacts during a test stream.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery indicator on the LiveShell X reads empty immediately after fitting a charged cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the encoder's fuel gauge has lost its calibration reference — common after a deep discharge or after swapping cells. The gauge reads state of charge from a coulomb counter that resets incorrectly if the previous pack hit hard cutoff. Charge the new battery to 100% uninterrupted using the LiveShell X's own charging circuit, then run it down through a complete encode session without interruption. One full cycle resets the reference point and restores accurate gauge readings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426160607322,"sku":"BWCS-CLX400SL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426160640090,"sku":"BWCS-CLX400SL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426160672858,"sku":"BWCS-CLX400SL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLX400SL-1.webp?v=1779930436"},{"product_id":"xvive-u6-wireless-microphone-transmitter-replacement-battery-38v-260mah-li-polymer","title":"Xvive U6 Wireless Microphone Replacement Battery 3.8V 260mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXvive U6 Wireless Microphone Transmitter — 3.8V Li-Polymer Replacement Battery (502729)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 260mAh Li-Polymer battery replaces the internal cell in the Xvive U6 Wireless Microphone Transmitter. The U6 is a compact wireless transmitter used in live sound, presentations, and studio recording setups. When the original cell degrades and the transmitter cuts out mid-use, this direct swap restores full operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eU6 transmitter fit:\u003c\/strong\u003e\n    The U6 uses a small integrated Li-Polymer cell running at 3.8V to power both the DSP stage and the RF transmit circuit simultaneously. This cell matches that voltage rail, connector, and 26.00 × 23.20 × 4.00mm footprint exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell under combined DSP and transmit load on the U6. The BMS held stable voltage across the full discharge curve without triggering an early cutoff under sustained RF output.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eLi-Polymer storage care for the U6:\u003c\/strong\u003e\n    If the U6 will sit unused for more than two weeks, discharge to around 50% before storing. Li-Polymer cells stored at full charge accelerate electrolyte breakdown — a particular issue in a small 260mAh cell where degradation shows faster than in larger packs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the U6 transmitter drops signal mid-performance on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe U6 draws current from two loads at once — the DSP processing block and the RF transmit stage. Under peak transmit load, current spikes briefly but sharply. If the replacement cell has a higher internal resistance than the original, voltage sags below the BMS cutoff threshold during those spikes. The transmitter interprets this as a depleted cell and shuts down even when the battery still holds charge. A properly spec'd 3.8V Li-Polymer cell with low internal resistance prevents the sag that triggers that false cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery indicator reads low immediately after fitting a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe U6 battery indicator reads open-circuit voltage at power-on to estimate charge level. A replacement cell shipped in storage mode may sit at 3.5V or below, which the firmware maps directly to a low-battery state. This is not a fault with the cell. Charge the replacement fully before judging its state — a full charge cycle brings the cell to 4.2V and resets the indicator to full.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426161098842,"sku":"BWCS-XUR601SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426161131610,"sku":"BWCS-XUR601SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426161164378,"sku":"BWCS-XUR601SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XUR601SL-1.webp?v=1779930459"},{"product_id":"xvive-u6-wireless-microphone-receiver-replacement-battery-37v-420mah-li-polymer","title":"Xvive U6 Wireless Microphone Receiver Replacement Battery 3.7V 420mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXvive U6 Wireless Microphone Receiver — 3.7V Li-Polymer Replacement Battery (AHB452730)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 420mAh Li-Polymer cell replaces the AHB452730 battery in the Xvive U6 Wireless Microphone Receiver. The U6 receiver sits in the signal chain between the transmitter and your audio source — when this cell degrades, the receiver loses hold on the RF link before any low-battery LED fires. At 30.30 x 25.30 x 4.50mm it fits the original battery bay with no modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eU6 receiver fitment:\u003c\/strong\u003e\n    The AHB452730 cell is specific to the U6 receiver unit — not interchangeable with the transmitter pack. The connector polarity and BMS communication line are matched to the receiver's onboard charge circuit, which runs a different charge profile than the transmitter side.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the U6 receiver through full RF acquisition and sustained audio pass-through. The BMS held the 3.7V nominal rail steady under combined DSP and RF receive draw, and the protection circuit triggered cleanly at the low-voltage cutoff threshold without nuisance trips.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eReceiver storage between gigs:\u003c\/strong\u003e\n    The U6 receiver's BMS will enter deep-discharge protection if stored at full depletion for more than two weeks. Store the receiver at roughly 50% charge — enough cell voltage to keep the BMS active so it accepts a charge immediately next session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the U6 receiver drops the RF link mid-performance on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell at 4.2V full charge can cause a brief voltage fluctuation when the receiver's RF front-end and DSP draw current simultaneously at power-on. If the cell's internal resistance is slightly elevated — common in cells that sat in warehouse inventory — the voltage briefly sags below the BMS trip threshold, and the receiver resets the RF link. The fix is to cycle the new battery once through a full charge before the first live use. This conditions the cell's internal resistance and stabilises the voltage rail under combined load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver won't re-sync with transmitter after swapping the battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the receiver battery cuts power to the RF pairing memory on some U6 firmware versions — the receiver wakes up without the transmitter's channel stored. This is not a battery fault; it is a power-loss re-initialisation. After fitting the new cell, hold the pairing button on both the transmitter and receiver until the sync LED confirms lock. Confirm the transmitter is sending signal at its set frequency before assuming the battery is the fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426161590362,"sku":"BWCS-XUT600SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426161623130,"sku":"BWCS-XUT600SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426161655898,"sku":"BWCS-XUT600SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XUT600SL-1.webp?v=1779930459"},{"product_id":"hollyland-mars-4k-replacement-battery-74v-2000mah-li-ion","title":"Hollyland HL-NP550 Mars 4K Replacement Battery 7.4V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHollyland Mars 4K \/ Mars 400S Pro \/ Solidcom C1 Pro — 7.4V Li-ion Replacement Battery (HL-NP550)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 2000mAh (14.8Wh) Li-ion battery replaces the HL-NP550 cell used in Hollyland wireless video transmission systems including the Mars 4K, Mars 400S Pro, Mars 300 Pro, and Solidcom C1 Pro. It fits the transmitter and receiver units used in professional video production. Voltage and form factor match OEM spec at 70.80 × 38.50 × 21.00mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMars 4K and Mars 400S Pro shared platform:\u003c\/strong\u003e\n    These units run the same 7.4V power rail and use the same battery bay connector, which is why one cell covers the full lineup. The BMS handshake across these models uses the same charge termination protocol — the replacement triggers charge complete at the same threshold as the factory cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through transmit-active load conditions on the Mars 4K. The BMS held voltage above the low-battery cutoff point without unexpected shutdowns, and the protection circuit responded correctly to overcurrent during peak DSP and RF transmit draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-weather transmit tip:\u003c\/strong\u003e\n    Li-ion capacity drops noticeably below 5°C. On outdoor shoots in cold conditions, keep the spare battery in an inner pocket until the moment of swap — a cold cell can trigger the low-battery warning well before actual depletion, cutting transmission early.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under combined RF transmit and DSP load on the Mars 4K\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Mars 4K draws simultaneous current for its RF transmitter, video encoder, and DSP stack. This combined load creates brief current spikes that can push a degraded or counterfeit cell below the BMS cutoff threshold, causing sudden shutdowns mid-transmission. A correctly rated 2000mAh cell maintains enough internal capacity headroom to absorb those spikes without triggering protection. If the unit shuts off under full transmit load, check resting voltage first — a healthy cell should read 7.4–8.2V at rest before load is applied.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver fails to sync after swapping the transmitter battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the transmitter loses power — even briefly during a battery swap — some Mars series receivers drop the paired link and do not automatically re-establish it. This is not a battery fault; it is the system's power-loss behaviour. After fitting the replacement battery and powering the transmitter back on, press the pairing button on both units to re-establish the link manually. Confirm the receiver's signal indicator is solid before rolling camera again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426162049114,"sku":"BWCS-HLM400SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426162081882,"sku":"BWCS-HLM400SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426162114650,"sku":"BWCS-HLM400SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HLM400SL-1.webp?v=1779930436"},{"product_id":"dji-sdr-transmission-replacement-battery-74v-2000mah-li-ion","title":"DJI SDR Transmission Replacement Battery 7.4V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDJI SDR Transmission \/ TX-RX DDR Transmission — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 2000mAh (14.8Wh) Li-ion battery replaces the internal cell in the DJI SDR Transmission, SDR Wireless Video Transmission, RX DDR Transmission, and TX DDR Transmission units. It restores power to the transmitter or receiver so drone operators can maintain full control link and video downlink capability in the field. Carry a spare and swap between flights rather than waiting for a recharge on site.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSDR and DDR platform compatibility:\u003c\/strong\u003e\n    The SDR and DDR units in this family share the same 7.4V nominal cell format, connector footprint, and BMS handshake logic. Swapping this battery across TX and RX units in the same kit keeps voltage rails matched and avoids cross-platform calibration errors in the control link.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell under combined transmit-plus-DSP load — the peak draw profile that stresses most replacement cells. The BMS held the output rail steady through sustained high-draw cycles and tripped cleanly at the low-voltage cutoff without locking the unit into a fault state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-weather transmitter use:\u003c\/strong\u003e\n    Li-ion cells at 7.4V lose output voltage faster below 5°C than the BMS protection threshold accounts for at room temperature. If you fly in cold conditions, keep the transmitter body-side or in an insulated pocket between flights — a cold cell can read 20–30% capacity remaining and then cut off abruptly mid-session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under combined transmit and DSP load on the SDR unit\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SDR Transmission pulls two loads simultaneously: the RF transmit chain and the onboard DSP processing the video signal. Together these create short current spikes that can push a degraded or underspec cell below the BMS low-voltage trip point even when the indicator shows partial charge. A replacement cell needs sufficient internal resistance headroom to stay above 6.0V under that combined spike load. This battery's cell chemistry keeps internal resistance low enough that the voltage rail stays stable through the combined draw without false cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not syncing to transmitter after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome DDR and SDR units lose their pairing state when power is fully interrupted — the control link re-initialisation sequence does not always run automatically on power-up with a new cell. If the RX unit shows no link after swapping the TX battery, hold both units powered on for 30 seconds before initiating a manual re-pair from the transmitter menu. Confirm the TX output voltage reads at or above 7.2V before attempting re-pair — a cell below that threshold causes the handshake to time out. Full re-pair from the transmitter side resolves the link in most cases.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426162770010,"sku":"BWCS-HLM400SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426162802778,"sku":"BWCS-HLM400SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426162835546,"sku":"BWCS-HLM400SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HLM400SL-1.webp?v=1779930436"},{"product_id":"peterson-bbs-1-replacement-battery-37v-700mah-li-ion","title":"Peterson BBS-1 Compatible Battery 3.7V 700mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePeterson BBS-1 BodyBeat Sync — 3.7V Li-ion Replacement Battery (YT423441)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh Li-ion cell replaces the internal battery in the Peterson BBS-1 and BBS-1 BodyBeat Sync Wireless Pulsating Metronome. The BBS-1 is a wearable wireless metronome — a body-worn pulsating device used by musicians to feel tempo rather than hear it. When the original cell degrades, pulse output weakens or stops; this replacement restores full operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBBS-1 and BodyBeat Sync compatibility:\u003c\/strong\u003e\n    Both devices share the same PCB voltage rail, connector footprint, and BMS handshake threshold. The YT423441 cell matches all three, so the unit powers on and communicates with the transmitter without re-pairing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through transmit-and-receive sequences on the BBS-1 platform. The BMS held cutoff cleanly at the low-voltage threshold — no false low-battery flags, no mid-session shutdowns.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eWireless sync tip for the BBS-1:\u003c\/strong\u003e\n    After swapping the internal cell, the BBS-1 and its paired transmitter may lose sync. Power both units off completely, replace the battery, then power the transmitter on first before the receiver to force a clean re-pair handshake.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePulse output weakening before low-battery indicator triggers on the BBS-1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BBS-1 drives its vibration motor and wireless receiver simultaneously. As the Li-ion cell ages, internal resistance climbs — voltage sags under the combined draw even though open-circuit voltage still reads acceptable. The BMS logs the cell as adequate, but the motor driver sees insufficient voltage and reduces pulse force. Replacing the cell at the first sign of weak pulse — rather than waiting for the indicator — prevents missed beats mid-session.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not syncing to transmitter after internal battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePulling the internal cell cuts power entirely, clearing the receiver's paired-device memory on some BBS-1 units. When the new cell goes in and the receiver boots, it scans for a transmitter signal but finds nothing if the transmitter is still off or mid-boot. Power the transmitter first, wait for its status LED to stabilise, then power the receiver. If sync still fails, hold the pair button on the transmitter until the receiver LED confirms lock — typically within 5 seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426163556442,"sku":"BWCS-PBS100SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426163589210,"sku":"BWCS-PBS100SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426163621978,"sku":"BWCS-PBS100SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PBS100SL-1.webp?v=1779930458"},{"product_id":"sennheiser-hde2020-ii-replacement-battery-37v-800mah-li-polymer","title":"Sennheiser HDE2020-II Replacement Battery 3.7V 800mAh AHB534403","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser HDE2020-II — 3.7V Li-Polymer Replacement Battery (AHB534403)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-Polymer battery for the Sennheiser HDE2020-II wireless transmitter and receiver system. It replaces OEM part AHB534403 and fits the HDE 2020-II, HDE 2020-D, and HDE 2020-D II units. Slim cell dimensions of 63.10 × 35.00 × 4.20mm match the original housing exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHDE 2020 series compatibility:\u003c\/strong\u003e\n    The HDE 2020-II, HDE 2020-D, and HDE 2020-D II share the same battery bay geometry, connector pinout, and 3.7V nominal rail. All three variants draw from the same BMS handshake protocol, so one cell covers the full model range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the HDE 2020-II transmitter. The BMS accepted the pack without fault codes, balanced correctly at 4.2V peak, and held cutoff at the expected low-voltage threshold without triggering premature shutdown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eTransmitter contact maintenance:\u003c\/strong\u003e\n    The HDE 2020-II battery contacts are exposed gold pads — not spring-loaded pins. If the transmitter starts reporting low battery on a fresh pack, inspect the contacts for oxidation or debris. A light wipe with isopropyl alcohol restores conductivity before swapping cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter dropping signal mid-broadcast on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HDE 2020-II combines RF transmission and DSP processing on a single power rail. Under peak load — high RF output plus active DSP — current draw spikes sharply. A degraded or undersized cell can sag below the BMS cutoff threshold during those spikes, triggering an abrupt shutdown that looks like signal loss at the receiver. This cell is rated at 800mAh with a low internal resistance profile that keeps voltage sag within acceptable limits during combined transmit and DSP draw. If dropouts persist after fitting a fresh cell, check that the battery contacts are fully seated and reading above 3.6V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not syncing after the transmitter battery is swapped\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome HDE 2020 series units lose their RF pairing when the transmitter fully powers down — a battery swap counts as a hard power cycle. After fitting this cell, the transmitter boots from 0V rather than waking from sleep, and the receiver may not automatically re-acquire the channel. Power both units off completely, then power the receiver on first, followed by the transmitter, and run the sync procedure as described in the HDE 2020-II manual. If the receiver still shows no link, confirm transmitter voltage is above 3.7V before attempting re-pair.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426164310106,"sku":"BWCS-SDE202SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426164342874,"sku":"BWCS-SDE202SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426164375642,"sku":"BWCS-SDE202SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDE202SL-1.webp?v=1779930458"},{"product_id":"sennheiser-ek2020-replacement-battery-37v-1500mah-li-polymer","title":"Sennheiser EK2020 Receiver Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser EK2020 \/ EK 2020-D-II Receiver — 3.7V Li-Polymer Replacement Battery (543604)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1500mAh Li-Polymer cell replaces the internal battery in the Sennheiser EK2020 and EK 2020-D-II wireless receiver units. It matches OEM part numbers 543604 and 19082102-1. Dimensions are 67.00 × 39.20 × 4.20mm — the flat profile fits the receiver's slim chassis without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEK2020 and EK 2020-D-II compatibility:\u003c\/strong\u003e\n    Both receiver variants share the same battery bay geometry, connector pinout, and 3.7V supply rail. The BMS handshake is identical across the two, so one cell covers both units.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the EK2020 receiver under active RF reception and DSP processing load. The BMS held cutoff voltage cleanly and did not trigger false low-battery warnings during the draw spike at RF lock-on.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact cleaning before install:\u003c\/strong\u003e\n    The EK2020 receiver uses a recessed flat-pack connector. Oxidation on the gold pads — even light discolouration — causes intermittent contact and receiver dropouts. Wipe the pads with isopropyl alcohol before fitting the new cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver dropping signal mid-broadcast after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EK2020 draws a combined load from the RF front-end and the audio DSP simultaneously. If the replacement cell has high internal resistance, voltage sags below the BMS protection threshold during that combined draw spike, triggering a momentary cutoff that reads as a signal drop. This is not a transmitter fault. Check the replacement cell's internal resistance — it should be under 150mΩ for stable operation at this load profile. A cell measuring above that threshold will sag on every RF lock-on event.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not re-syncing to transmitter after power loss\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the EK2020 loses power mid-session — either from a depleted cell or a BMS cutoff — the pairing data held in volatile memory is cleared on some firmware versions. The receiver comes back on but fails to lock onto the transmitter. This is not a fault with the new battery. Power on the transmitter first, then power on the receiver, and run a manual RF scan from the receiver menu to re-establish the link. Once re-paired on stable power, the sync persists across normal power cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426165325914,"sku":"BWCS-SEK202SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426165358682,"sku":"BWCS-SEK202SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426165391450,"sku":"BWCS-SEK202SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SEK202SL-1.webp?v=1779930458"},{"product_id":"lectrosonics-ssm-transmitters-replacement-battery-37v-750mah-li-ion","title":"Lectrosonics LB-50 Replacement Battery 3.7V 750mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLectrosonics SSM Transmitters \/ IFBR1B Receiver — 3.7V Li-ion Replacement Battery (LB-50)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 750mAh (2.78Wh) Li-ion replacement for the Lectrosonics LB-50 battery. It fits the SSM Bodypack Transmitter, SSM Micro Transmitter, and IFBR1B Receiver — compact wireless audio devices used in professional broadcast and live production. Voltage and form factor match the original cell exactly at 40.26 x 35.24 x 6.50mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSSM and IFBR1B compatibility:\u003c\/strong\u003e\n    These devices share the LB-50 footprint and the same 3.7V single-cell architecture. The BMS on each unit communicates charge state over the same contact arrangement, so this replacement cell integrates without modification or re-pairing the transmitter-receiver link.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on SSM-class hardware. The BMS accepted the cell without fault flags, voltage held stable under combined RF transmit and DSP load, and charge termination triggered cleanly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact condition before fitting:\u003c\/strong\u003e\n    On SSM bodypacks used in heavy production, sweat and handling residue build up on the battery contacts. A corroded contact creates a resistive joint — the BMS reads a false low-voltage state even on a fresh cell. Clean the contacts with isopropyl alcohol before fitting the new battery.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter dropping signal mid-broadcast on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SSM transmitter draws current simultaneously from the RF stage and the DSP processing block. Under that combined load, a cell with elevated internal resistance — even a new one that sat in storage too long — can sag below the BMS cutoff threshold momentarily, triggering a shutdown. This appears as a clean signal drop with no warning on the receiver. Check the open-circuit voltage of the replacement cell before fitting: it should read 3.6–3.7V. A cell reading below 3.5V off the shelf has likely self-discharged past its recoverable range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver not syncing after swapping the transmitter battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the SSM transmitter during a session can cause the transmitter to lose its stored RF channel and group settings on some firmware versions. When power is restored with the new cell, the transmitter broadcasts on a default or reset frequency that the IFBR1B receiver is not tuned to — so sync never completes. The fix is straightforward: after fitting the new battery, cycle the transmitter power and manually re-initiate the sync sequence from the receiver side. Confirm the transmitter's frequency group matches the receiver before going live.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426165489754,"sku":"BWCS-LRB500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426165522522,"sku":"BWCS-LRB500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426165555290,"sku":"BWCS-LRB500SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LRB500SL-1.webp?v=1779930437"},{"product_id":"wisycom-mrp61-transmitter-replacement-battery-37v-1050mah-li-ion","title":"Wisycom LBP61 MRP61 Transmitter Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWisycom MRP61 Transmitter — 3.7V Li-ion Replacement Battery (LBP61)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1050mAh Li-ion replacement for the Wisycom LBP61 battery. It fits the MRP61 wireless microphone transmitter, used in professional audio production, broadcast, and live sound. The MRP61 draws continuous RF output alongside DSP processing, so a worn cell causes voltage sag and early cutoff.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMRP61 transmitter fit:\u003c\/strong\u003e\n    The MRP61 uses a dedicated lithium cell on a 3.7V rail. The LBP61 form factor — 40.60 × 36.26 × 7.10mm — locks into the transmitter bay with a fixed contact array. A different cell geometry will misalign those contacts and break the power path entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the MRP61's combined RF-transmit and DSP load cycle. The BMS held voltage above the transmitter's low-battery cutoff threshold through full discharge, with no mid-cycle shutoff triggered by inrush from the RF stage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact maintenance before field use:\u003c\/strong\u003e\n    The MRP61 battery contacts are recessed and collect debris during pack swaps on location. Wipe the gold contacts on both the cell and the bay with a dry lint-free cloth before each shoot. Oxidised contacts raise contact resistance, which the transmitter reads as a voltage drop and flags as low battery even on a fresh cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoltage sag under simultaneous RF and DSP draw on the MRP61\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MRP61 runs RF transmission and audio DSP simultaneously — both draw from the same 3.7V cell at the same time. On a degraded cell, that combined load pulls terminal voltage below the transmitter's operating floor faster than either load would alone. The BMS interprets this as end-of-charge and triggers a protective cutoff. A fresh cell with full capacity holds the voltage rail stable through both loads without sag-induced shutdown.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver fails to sync after swapping a flat LBP61 in the field\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the MRP61 loses power completely — cell fully discharged mid-session — some Wisycom receiver setups drop the RF link and do not auto-recover on restart. The transmitter comes back on frequency, but the receiver still holds the last known state and waits for a sync handshake it did not receive. Power cycle the receiver after reinserting the charged battery, then re-initiate the RF scan or pairing sequence from the receiver menu. Confirm the transmitter is transmitting before re-pairing — the RF indicator on the MRP61 should show green at 3.7V nominal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426166210650,"sku":"BWCS-WMP610SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426166243418,"sku":"BWCS-WMP610SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426166276186,"sku":"BWCS-WMP610SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WMP610SL-1.webp?v=1779930459"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-CRM300MD-6.webp?v=1780022358","url":"https:\/\/batteryweb.com\/collections\/transmitters-receiver.oembed?page=2","provider":"BatteryWeb","version":"1.0","type":"link"}