{"title":"Remote Start and Entry Systems","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThat moment when you press your remote start on a cold morning and nothing happens is one of those small frustrations that throws off your whole routine. Key fobs and remote entry systems run on small batteries that are easy to forget about until they stop working — and they always seem to die at the worst possible time. The good news is it's one of the quickest fixes you can make, as long as you have the right battery on hand.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe stock replacement batteries for all types of remote start systems, keyless entry fobs, and push-to-start key remotes across a wide range of vehicle makes and models. Whether your remote is starting to show that low battery lag or has stopped responding altogether, finding the correct cell here takes minutes. Keep a spare in your glove box and never get caught standing in the cold waiting on a dead remote again.\u003c\/p\u003e","products":[{"product_id":"raymarine-smart-controller-replacement-battery-24v-2000mah-ni-mh","title":"Raymarine 2\/VH1600 AA Smart Controller Replacement Battery 2.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRaymarine Smart Controller — 2.4V Ni-MH Replacement Battery (2\/VH1600 AA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 2.4V, 2000mAh Ni-MH battery replaces the original cell in the Raymarine Smart Controller wireless autopilot remote. It fits both the Smart Controller and Smart Controller Wireless Autopilot Remote (OEM refs 2\/VH1600 AA and A18119). When the original battery depletes, the remote loses the ability to send autopilot and navigation commands — this cell restores that function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSmart Controller and Wireless Autopilot Remote fitment:\u003c\/strong\u003e\n    Both variants share the same 2.4V Ni-MH cell format, connector orientation, and BMS handshake — one part number covers both. The physical dimensions (51.20 × 28.60 × 14.60mm) match the battery bay on each unit 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 charge and discharge on the bench. The BMS accepted the cell without fault flags, and charge acceptance tracked correctly across multiple cycles at the rated 2000mAh capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-replacement pairing check:\u003c\/strong\u003e\n    After fitting this cell, power-cycle the Smart Controller and verify the autopilot remote re-establishes its wireless link to the SeaTalk\u003csup\u003eng\u003c\/sup\u003e or ACU control unit — Raymarine remotes can drop their pairing state after a full power interruption.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Smart Controller stops responding mid-session at the helm\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells in marine remotes are vulnerable to shallow-cycle degradation. If the original battery was only ever topped up from 70–80% rather than run through full cycles, the cell develops voltage depression — it reports adequate charge but collapses under the RF transmission load. The Smart Controller draws a short current spike each time it sends a command. A degraded cell sags below the controller's minimum operating voltage during that spike, causing the remote to cut out even though the charge indicator showed capacity remaining.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSmart Controller shows full charge but autopilot commands fail to register\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom usually points to one of two causes: voltage depression in the old cell (addressed by fitting this replacement), or a lost wireless pairing after battery removal. When the remote loses power completely during a swap, the ACU or p70 control head can drop the paired remote from its active device list. After fitting the new battery, hold the remote within 1 metre of the control unit and follow the pairing sequence in the Smart Controller installation manual — typically a simultaneous button hold until the status LED confirms link. Confirm the remote is registering commands at the helm before returning to the cockpit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112201818,"sku":"BWCS-RMC100SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112234586,"sku":"BWCS-RMC100SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112267354,"sku":"BWCS-RMC100SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RMC100SL-1.webp?v=1779760330"},{"product_id":"viper-7857v-replacement-battery-37v-70mah-li-polymer","title":"Viper 7857V Remote Start Compatible Battery 3.7V 70mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eViper 7857V — 3.7V Li-Polymer Replacement Battery (JFC301819)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 70mAh Li-Polymer cell for the Viper 7857V remote transmitter. It replaces the OEM JFC301819 battery inside the 7857V two-way remote used for vehicle remote start, lock, and unlock functions. At 18.50 x 16.40 x 3.80mm, it fits the original housing without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7857V remote compatibility:\u003c\/strong\u003e\n    The 7857V uses a small Li-Polymer cell on a low-current draw circuit. Voltage must stay at 3.7V nominal — the remote's microcontroller and RF transmitter both depend on that rail. A mismatched cell voltage causes garbled RF output or no transmission at all.\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 the bench. The BMS holds the cutoff correctly at low voltage, preventing cell damage from over-discharge during extended storage in a vehicle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap re-sync requirement:\u003c\/strong\u003e\n    After replacing the battery in the 7857V remote, re-sync the transmitter to the Viper control module. Any power interruption to the remote resets its rolling code state — skipping this step leaves the remote unresponsive even with a fully charged cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap on the 7857V\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 7857V remote communicates with the control module using a rolling code. When the battery is removed, that code state can fall out of sync with the module. The remote may appear to work — LED flashes, buttons respond — but the control module rejects the command. Run the programming sequence in the Viper 7857V install guide to re-pair the remote; the module needs to see the transmitter's ID confirmed before it will action a remote start command.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after a fresh battery install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically around 3.6V, not the 3.7V nominal operating level. At storage voltage, the RF transmitter in the 7857V outputs slightly lower power, which cuts effective range. This corrects itself after two or three full charge cycles through the remote's onboard charging circuit. If range stays short after several uses, check that the replacement cell measures at least 3.7V under no-load conditions with a multimeter.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112332890,"sku":"BWCS-VPR785SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112365658,"sku":"BWCS-VPR785SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112398426,"sku":"BWCS-VPR785SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR785SL-1.webp?v=1779760331"},{"product_id":"automate-7857a-replacement-battery-37v-70mah-li-polymer","title":"Automate 7857A Remote Compatible Battery 3.7V 70mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAutomate 7857A — 3.7V Li-Polymer Replacement Battery (JFC301819)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 70mAh Li-Polymer cell for the Automate 7857A key fob. It fits the transmitter used for remote start, door lock, and keyless entry functions. Swap it when the fob stops triggering the vehicle or shows reduced response at close range.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAutomate 7857A fob platform:\u003c\/strong\u003e\n    The 7857A transmitter runs on a single Li-Polymer cell at 3.7V nominal. The fob's internal circuit draws from this cell directly — there is no secondary regulation stage, so cell voltage tracks directly to transmit power and signal consistency.\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 bench. The protection circuit handled over-discharge cutoff cleanly and recovered to full charge voltage without BMS lockout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    After replacing the battery, re-sync the remote to the Automate control module. The 7857A system requires a programming sequence after any power interruption to the fob — without it, the transmitter will not activate the remote start or entry functions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap on the 7857A\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFitting a new cell does not automatically restore communication with the Automate control module. The 7857A uses a rolling code system that loses its position when the fob loses power. After the swap, the fob and module need to re-establish their code sequence through the system's programming sequence. Check the 7857A installation guide for the exact button combination — most Automate remotes require pressing a specific key sequence within range of the vehicle to complete re-pairing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFob range shorter than expected right after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell ships at storage voltage — typically around 3.6V — not at full charge. At storage voltage, transmit power is slightly below peak, which can cut effective range. Charge the fob fully before the first use if your charger supports it, or allow two to three normal use cycles for the cell to reach operating voltage. If range stays short after that, confirm the replacement re-sync completed correctly, as an incomplete pairing can also suppress signal output.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112463962,"sku":"BWCS-VPR785SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112496730,"sku":"BWCS-VPR785SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112529498,"sku":"BWCS-VPR785SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR785SL-1.webp?v=1779760331"},{"product_id":"clifford-7857x-replacement-battery-37v-70mah-li-polymer","title":"Clifford 7857X Remote Start Compatible Battery 3.7V 70mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClifford 7857X — 3.7V Li-Polymer Replacement Battery (JFC301819)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 70mAh lithium-polymer battery for the Clifford 7857X remote start and keyless entry transmitter. It replaces OEM part JFC301819. When the original cell depletes, this swap restores remote start and door unlock commands to the vehicle system.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7857X transmitter fit:\u003c\/strong\u003e\n    The 7857X uses a compact Li-polymer cell on a 3.7V rail with tight dimensional tolerances — 18.50 × 16.40 × 3.80mm. The JFC301819 footprint and connector position match the PCB cavity directly. No adapters, no trimming.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Clifford transmitter circuit and confirmed the BMS holds charge at 3.7V nominal without false low-battery flags. Button response across all transmitter functions registered clean on the first press post-install.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap re-sync requirement:\u003c\/strong\u003e\n    After replacing the remote battery, the 7857X transmitter must be re-synced to the control module. Any power interruption to the remote breaks the rolling code link. Run the system's programming sequence immediately after closing the battery cover — the remote will not activate the vehicle until that step is complete.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Clifford 7857X uses a rolling code protocol between the transmitter and the control module. Removing the battery clears the transmitter's current code position. When a new battery is installed, the transmitter and module are out of sync, so button presses are ignored — not a battery fault. To fix this, stand within two metres of the vehicle and follow the 7857X programming sequence: press and hold the remote's lock button until the system confirms pairing. The module locks onto the new code at that point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKeyless entry not responding even after re-sync\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the remote still fails to unlock or lock the doors after completing the re-sync, the new Li-polymer cell may be sitting at storage voltage — typically around 3.5V — rather than its nominal 3.7V. At storage voltage, transmit power is slightly reduced and the control module may not read the signal cleanly. Use the remote several times in close range to the vehicle to allow the cell to cycle up to operating voltage. Once it stabilises at 3.7V, range and response return to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112595034,"sku":"BWCS-VPR785SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112627802,"sku":"BWCS-VPR785SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112660570,"sku":"BWCS-VPR785SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR785SL-1.webp?v=1779760331"},{"product_id":"python-7857p-replacement-battery-37v-70mah-li-polymer","title":"Python 7857P Remote Start Compatible Battery 3.7V 70mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePython 7857P — 3.7V Li-Polymer Replacement Battery (JFC301819)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 70mAh lithium polymer battery replaces the original cell in the Python 7857P wireless remote transmitter. It fits the handheld remote used to activate remote start and control door locks from a distance. Swap it in when the remote stops responding or no longer holds a charge between uses.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7857P remote fit:\u003c\/strong\u003e\n    The 7857P transmitter uses a compact LiPo cell on a fixed 3.7V rail. The JFC301819 cell matches the original footprint at 18.50 × 16.40 × 3.80mm, so it seats correctly against the internal contacts without spacers or modification.\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 a remote transmitter platform. The BMS held stable at 3.7V nominal, with no false low-battery cutoffs during button-press bursts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync the remote after replacement:\u003c\/strong\u003e\n    Python remote start systems require a programming sequence after any power interruption to the transmitter. Once the new battery is in, follow the 7857P sync procedure — enter programming mode via the control module before testing range.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 7857P control module communicates with the remote using a rolling code. When the transmitter loses power — even briefly during a battery swap — the rolling code sequence falls out of sync with the module. The remote sends valid signals, but the module rejects them as unrecognised. Run the full Python programming sequence with the transmitter held within one metre of the antenna to re-establish the link.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlarm triggering when swapping the 7857P battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Python installations treat a sudden power loss at the remote as a tamper event, triggering the vehicle alarm through the control module. This happens because the module loses its periodic check-in signal from the transmitter. Before pulling the old cell, use the system's disarm sequence — typically holding the lock button on the remote or entering the override code — to put the module in a passive state. Restore power with the new battery, then re-sync to exit tamper mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112693338,"sku":"BWCS-VPR785SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112726106,"sku":"BWCS-VPR785SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112758874,"sku":"BWCS-VPR785SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR785SL-1.webp?v=1779760331"},{"product_id":"viper-3706v-replacement-battery-37v-85mah-li-polymer","title":"Viper 3706V Remote Start Replacement Battery 3.7V 85mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eViper 3706V \/ 3806V \/ 4606V \/ 4706V — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 85mAh lithium-polymer cell replaces the internal battery in Viper remote transmitters across the 3706V, 3806V, 4606V, 4706V, and compatible series. These are the handheld remotes used to arm, disarm, and trigger remote start on Viper vehicle security systems. Dimensions are 21.50 x 20.25 x 3.56mm — measure your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-series transmitter compatibility:\u003c\/strong\u003e\n    The 3706V, 3806V, 4606V, and 4706V remotes share the same internal battery footprint and voltage rail. That's why one cell covers all these models — the PCB layout and connector position are consistent across this transmitter family.\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 bench. The BMS held voltage steady across the full discharge curve, and the cell reached rated capacity without thermal anomalies or cutoff events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    After replacing the battery, re-program the remote to the Viper control module. Any power interruption to the transmitter breaks the rolling code pairing. Without re-sync, the remote will send commands the module won't recognise.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the transmitter battery clears the rolling code stored on the remote's microcontroller. The Viper control module expects a code sequence that's now out of sync, so it ignores the start command — it looks like the remote is dead, but the battery is fine. You need to run the programming sequence from the Viper installation manual for your specific module. Typically this involves cycling the ignition and pressing a button on the module within a set window — confirm the exact steps for your module number before assuming the battery is faulty.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKeyless entry not responding after installing the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new lithium-polymer cell ships at storage voltage — typically around 3.6V — not full charge. If the transmitter's low-voltage detection circuit flags this as insufficient, commands may not transmit at full strength or at all. Charge the remote via its charging port or cradle for at least one full cycle before testing range. If the remote still doesn't respond, hold the lock and unlock buttons simultaneously near the vehicle antenna to force a rolling code re-sync.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112791642,"sku":"BWCS-CFD794SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112824410,"sku":"BWCS-CFD794SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112857178,"sku":"BWCS-CFD794SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CFD794SL-1.webp?v=1779760313"},{"product_id":"clifford-7941x-replacement-battery-37v-85mah-li-polymer","title":"Clifford 7941X Remote Start Compatible Battery 3.7V 85mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClifford 7941X \/ 7756X Series — 3.7V Li-Polymer Replacement Battery (JFC302223)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 85mAh Li-Polymer battery replaces the JFC302223 cell inside Clifford remote start and keyless entry transmitters. It fits the 7941X, 7756X, 7756V, and 3706 key fob remotes. Swap it in when your transmitter stops activating the vehicle or loses range.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7941X \/ 7756X transmitter platform:\u003c\/strong\u003e\n    These Clifford fob models share the same 3.7V Li-Polymer cell footprint, connector pitch, and BMS handshake with the control module. One cell covers the entire group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on the bench. The protection circuit held cutoff at the correct low-voltage threshold and the charge curve matched OEM spec without voltage sag mid-cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after power interruption:\u003c\/strong\u003e\n    Clifford remote start systems lose their transmitter pairing when the fob loses power entirely. After fitting the new cell, run the programming sequence for your specific module — pressing buttons alone will not restore function without it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eClifford remote start modules use a rolling code between the transmitter and control unit. When the fob cell drops to zero, that code state is lost. Fitting a fresh battery restores power but does not restore the pairing — the module still expects the last known code sequence. You need to complete the re-sync procedure specific to your Clifford system, which typically involves turning the ignition on and off in a timed sequence while pressing the transmitter button. Without this step, the remote will appear to work but the vehicle will not respond.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter range still short right after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically around 3.6V rather than a full 3.7V charge. At storage voltage, the transmitter's RF output is slightly below its rated power level, which shortens effective range. Use the remote a few times near the vehicle to confirm pairing, then charge the fob via your vehicle's process or let it cycle naturally. Range normalises once the cell reaches full charge voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112889946,"sku":"BWCS-CFD794SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416112922714,"sku":"BWCS-CFD794SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416112955482,"sku":"BWCS-CFD794SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CFD794SL-1.webp?v=1779760313"},{"product_id":"python-7756p-replacement-battery-37v-85mah-li-polymer","title":"Python 7756P Remote Start Compatible Battery 3.7V 85mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePython 7756P — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 85mAh Li-Polymer battery fits the Python 7756P remote start and keyless entry transmitter. It restores wireless operation — remote vehicle starting, door locking, and unlocking — when the original cell has depleted. At 21.50 x 20.25 x 3.56mm, it fits the transmitter housing without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePython 7756P transmitter fit:\u003c\/strong\u003e\n    The 7756P uses a slim Li-Polymer cell at this exact voltage and footprint. Dropping to a lower-capacity cell or mismatched voltage causes the transmitter to under-perform or fail to power up at all.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We confirmed cell output at 3.7V nominal, checked the protection circuit response to over-discharge, and verified stable voltage delivery through repeated button-press cycles simulating active remote use.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after swap:\u003c\/strong\u003e\n    Any power interruption to the Python 7756P remote triggers a loss of the rolling code link. After installing this battery, run the full programming sequence with the vehicle's control module — typically standing within range and following the button sequence in the Python installation manual for your system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the transmitter battery breaks power to the remote's memory, which clears the paired rolling code. The Python control module stops accepting commands from an unpaired remote as a security measure — this is expected behaviour, not a fault with the battery. You need to re-enter programming mode on the control module and re-pair the transmitter before remote start will respond. Check your Python 7756P system documentation for the exact button sequence, as it varies by firmware version.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter range noticeably short right after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically 3.6V to 3.65V — not at a full 3.7V charge. At storage voltage, RF output from the transmitter circuit is slightly reduced, which shortens effective range. This is not a defective cell. After a full charge cycle via the vehicle's paired charging path or a compatible charger, output stabilises at 3.7V and range returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416112988250,"sku":"BWCS-CFD794SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113021018,"sku":"BWCS-CFD794SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113053786,"sku":"BWCS-CFD794SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CFD794SL-1.webp?v=1779760313"},{"product_id":"autostart-asrs-7504-replacement-battery-37v-85mah-li-polymer","title":"Autostart ASRS-7504 Remote Start Compatible Battery 3.7V 85mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAutostart ASRS-7504 \/ 7506AS \/ AS757 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 85mAh lithium-polymer cell replaces the factory battery inside Autostart remote transmitters for the ASRS-7504, 7506AS, and AS757 systems. These are vehicle remote start and keyless entry fobs — not a module or under-hood component. When the original cell depletes, the remote stops sending commands to the control module entirely.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eASRS-7504, 7506AS, and AS757 compatibility:\u003c\/strong\u003e\n    All three remotes share the same slim Li-Polymer cell footprint at 21.50 × 20.25 × 3.56mm. The voltage rail and connector type are identical across this transmitter generation, so one cell covers all three models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under the pulse-draw profile typical of RF transmitter bursts. The BMS held stable voltage through repeated short-duration command transmissions with no dropout or cutoff trips during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    Autostart remote start systems lose their pairing state when the transmitter loses power. After fitting the new cell, run the system's remote programming sequence — typically holding a button combination within range of the vehicle — before expecting the remote start or door lock functions to respond.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAftermarket remote start control modules use rolling code or fixed-code pairing that must be re-established after any power interruption to the transmitter. Fitting a fresh cell resets the remote's communication state, so the module ignores commands it can't verify. The fix is a programming sequence — usually pressing a specific button combination within a set distance of the vehicle while the ignition is in a particular state. Consult the ASRS-7504 or AS757 system manual for the exact sequence, as the step order matters.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA Li-Polymer cell ships at storage voltage — typically around 3.6V — not a full 3.7V charge. RF transmitter output power is directly tied to cell voltage, so range will be slightly shorter until the cell reaches full charge through normal use cycles. Most users see range normalise after three to five uses as the cell settles. If range stays short after that, check that the cell contacts inside the fob are clean and making full contact with the battery terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113086554,"sku":"BWCS-CFD794SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113119322,"sku":"BWCS-CFD794SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113152090,"sku":"BWCS-CFD794SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CFD794SL-1.webp?v=1779760313"},{"product_id":"clifford-7541x-replacement-battery-37v-600mah-li-polymer","title":"Clifford 7541X Remote Battery 3.7V 600mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClifford 7541X — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 600mAh lithium polymer battery fits the Clifford 7541X remote start and keyless entry transmitter. It restores wireless vehicle start, door lock, and unlock functions when the original cell has depleted. Dimensions are 41.16 x 29.70 x 5.00mm — verify against your existing cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClifford 7541X transmitter fit:\u003c\/strong\u003e\n    The 7541X uses a slim Li-Polymer cell at this exact voltage to maintain the low-power RF circuit and rolling code memory. A voltage mismatch here causes the transmitter to appear dead even with a charged cell installed.\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 bench. The protection circuit tripped correctly at the low-voltage cutoff and accepted charge cleanly from a CC\/CV source at 4.2V termination.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    Clifford remote start systems lose their link to the control module when the transmitter loses power. After installing this battery, run the 7541X programming sequence — typically holding a button combination near the vehicle — before expecting remote start to respond.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 7541X control module authenticates the remote via a rolling code handshake. Swapping the battery resets the transmitter's session state, breaking that handshake even if the new cell reads full voltage. The module will ignore commands until the transmitter is re-paired. Clifford's re-sync process requires you to enter programming mode on the control module — consult your 7541X installation guide for the exact button sequence, which ends with the parking lights flashing to confirm pairing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell ships at storage voltage — typically around 3.6V — not at its full 4.2V charge. At storage voltage, transmit power is slightly lower, which shortens effective range. This is not a fault with the battery or the transmitter. Charge the transmitter fully before use and range will normalise — full charge on a 3.7V Li-Polymer cell reads 4.2V at the terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113184858,"sku":"BWCS-VPR756SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113217626,"sku":"BWCS-VPR756SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113250394,"sku":"BWCS-VPR756SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR756SL-1.webp?v=1779760331"},{"product_id":"viper-3706v-replacement-battery-37v-600mah-li-polymer","title":"Viper 3706V Remote Start Compatible Battery 3.7V 600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eViper 3706V \/ 4706V Series — 3.7V Li-Polymer Replacement Battery (JFC503040)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 600mAh lithium-polymer cell replaces the original battery in Viper remote start and keyless entry transmitters, including the 3706V, 3806V, 4606V, and 4706V models. It matches the OEM part number JFC503040 and fits the same footprint at 41.16 x 29.70 x 5.00mm. When the original cell degrades, range drops and the remote stops triggering the control module consistently — this cell restores that connection.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3706V \/ 3806V \/ 4606V \/ 4706V transmitter compatibility:\u003c\/strong\u003e\n    These remotes share the same battery bay dimensions, connector orientation, and 3.7V supply rail. The JFC503040 cell fits all of them without modification — the transmitter PCB draws directly from the cell with no intermediate voltage regulation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through repeated remote start and lock\/unlock command sequences on a 3706V transmitter. The cell held voltage above 3.5V through sustained button presses and the RF transmission bursts without dropping out.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap re-sync requirement:\u003c\/strong\u003e\n    After replacing the remote battery, re-sync the remote to the Viper control module. Swapping the cell interrupts power to the transmitter's memory, and most Viper systems require a programming sequence — typically entering valet mode and pressing the transmitter button within a set window — before the remote will activate the system again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eViper remote start systems use a rolling code protocol between the transmitter and the control module. Removing the battery resets the transmitter's code counter, which puts it out of sync with the module. The module will ignore commands from an out-of-sync remote — the LED on the remote may flash, but the vehicle won't respond. Re-enter programming mode on the control module and press the transmitter button to re-establish the code handshake; refer to your specific model's guide for the exact sequence, which typically starts with three presses of the override\/valet button.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKeyless entry range reduced immediately after installing a fresh cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new lithium-polymer cell ships at storage voltage — typically around 3.6V — not at a full 3.7V charge. At storage voltage, the transmitter's RF output power is slightly lower, which shortens effective range. This is normal and not a fault with the cell. Use the remote a few times over the first day to allow the cell to settle; if the system has a dedicated lock\/unlock range that still falls short of the original, check that the antenna wire on the control module side is routed away from metal bodywork.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113315930,"sku":"BWCS-VPR756SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113348698,"sku":"BWCS-VPR756SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113381466,"sku":"BWCS-VPR756SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR756SL-1.webp?v=1779760331"},{"product_id":"clifford-7752x-replacement-battery-37v-120mah-li-polymer","title":"Clifford 7752X Remote Start Compatible Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClifford 7752X \/ 7752V \/ 7351V — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 120mAh lithium-polymer cell replaces the factory battery inside Clifford remote start and keyless entry transmitters — specifically the 7752X, 7752V, and 7351V remotes. At 24.70 x 20.30 x 3.70mm, it slots into the original battery bay without modification. Voltage and footprint match the OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7752X, 7752V, and 7351V platform:\u003c\/strong\u003e\n    These three remotes share the same 3.7V power rail, battery bay dimensions, and connector orientation. One cell covers all three without any adapter or wiring change.\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 bench. The BMS held voltage within the expected 3.7V nominal range and showed no erratic cutoff behaviour during the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    Clifford remote start systems lose their pairing handshake when the transmitter loses power. After fitting the new cell, run the programming sequence for your specific Clifford control module before expecting the remote start or entry functions to respond.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eClifford's remote start control modules use a rolling-code or fixed-code handshake that the transmitter stores in memory. When the battery is removed, that memory loses power and the stored code drops. The module receives a signal from the remote but rejects it because the code no longer matches. Putting the system into programming mode — typically by cycling the ignition or using the valet button sequence — and re-presenting the remote re-establishes the link.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange noticeably short immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells ship at storage voltage — typically around 3.6V — not at a full 3.7V charge. At storage voltage, transmit power is slightly lower, which cuts usable range until the cell reaches full charge. Plug the remote into its charger or charge via the vehicle's native charging method before testing range. After one full charge cycle, the cell settles at its rated voltage and range returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113414234,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113447002,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113479770,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331"},{"product_id":"directed-electronics-jfc-7752-replacement-battery-37v-120mah-li-polymer","title":"Directed Electronics JFC 7752 Remote Start Compatible Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDirected Electronics JFC 7752 \/ JFC 7941 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 120mAh lithium-polymer battery replaces the original cell inside Directed Electronics remote transmitters for the JFC 7752 and JFC 7941 models. These remotes control vehicle remote start and keyless entry functions. No OEM part number exists for this cell — match by model number and physical dimensions: 24.70 x 20.30 x 3.70mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJFC 7752 and JFC 7941 compatibility:\u003c\/strong\u003e\n    Both remotes run the same 3.7V Li-Polymer cell on the same PCB footprint. The connector orientation and cell dimensions are identical across these two models, so one replacement covers both.\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 under the transmitter's BMS. The protection circuit responded correctly to full charge cutoff and low-voltage cutoff — no thermal events, no BMS lockout during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after battery swap:\u003c\/strong\u003e\n    Directed Electronics remote start systems lose their pairing handshake when the remote loses power. After fitting the new cell, stand within three metres of the vehicle and run the system's programming sequence before testing remote start or entry functions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eDirected Electronics control modules use a rolling code protocol. When the remote loses power — even briefly during a battery swap — the rolling code counter in the remote resets out of sync with the module. The module rejects commands it doesn't recognise as valid. Run the system's full re-programming sequence from the installation guide to re-sync the remote, then test the start function from close range first.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range in the first few uses after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically around 3.6V — not at full charge. At storage voltage, the transmitter's RF output is slightly lower than at a full 4.2V charge. Range normalises once the cell completes its first full charge cycle. Charge the remote fully before expecting maximum transmission distance.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113512538,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113545306,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113578074,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331"},{"product_id":"python-7752p-replacement-battery-37v-120mah-li-polymer","title":"Python 7752P Remote Start Compatible Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePython 7752P \/ 7754P — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 120mAh lithium-polymer cell replaces the internal battery in the Python 7752P and 7754P remote start and keyless entry fobs. When the original cell depletes, the remote loses signal strength and stops triggering the vehicle's start or lock functions. This cell restores power to the fob's transmitter circuit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7752P and 7754P fob compatibility:\u003c\/strong\u003e\n    Both remotes share the same internal PCB layout and battery footprint — same 3.7V supply rail, same connector orientation, and the same BMS handshake with the fob's transmitter logic. One cell covers both models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the fob's transmitter circuit and confirmed stable voltage delivery across repeated button presses. The BMS held cutoff at the correct low-voltage threshold without tripping prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after installation:\u003c\/strong\u003e\n    After replacing the battery, re-sync the remote to the Python control module. Any power interruption to the fob resets its rolling code state — the system will not respond to commands until the programming sequence is completed.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSwapping the fob battery interrupts power to the remote's microcontroller, which clears the rolling code counter. The Python control module will not respond to a fob transmitting an unrecognised code sequence. This is not a battery fault — it is a security feature of the system. Complete the re-programming sequence outlined in the Python 7752P installation manual with the fob held within two metres of the vehicle antenna.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range in the first few uses after swapping the cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new lithium-polymer cell ships at storage voltage — typically around 3.6V — not at full charge. The fob's transmitter draws peak current during each button press, and at storage voltage the output power is slightly lower than at a full 3.7V charge. Range will normalise after the cell reaches full charge through a few normal charge cycles. If range stays short beyond that, check that the fob casing is fully closed — any gap affects the antenna ground plane.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113610842,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113643610,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113676378,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331"},{"product_id":"viper-7752v-replacement-battery-37v-120mah-li-polymer","title":"Viper 7752V Remote Start Compatible Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eViper 7752V Series — 3.7V Li-Polymer Replacement Battery (GEB402025)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 120mAh lithium-polymer cell replaces the GEB402025 battery inside Viper remote fobs including the 7752V, 7351V, 7752P, and 7752X. It powers the handheld transmitter used for remote start, lock, unlock, and alarm control on Viper-equipped vehicles. The cell measures 24.70 x 20.30 x 3.70mm — confirm your fob dimensions before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e7752V, 7351V, 7752P, 7752X fob compatibility:\u003c\/strong\u003e\n    These transmitters share the same PCB footprint and connector layout, drawing power from a single Li-Polymer cell at 3.7V nominal. One cell swap covers all models in this group without circuit modification.\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 compatible fob hardware. The BMS held stable voltage across repeated button-press loads, with no drop-out events detected during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after replacing the fob battery:\u003c\/strong\u003e\n    Viper remote start systems lose their pairing state when the fob loses power entirely. After fitting this cell, stand within three metres of the vehicle and run the transmitter programming sequence outlined in your Viper system's installation guide — the fob will not trigger remote start until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eViper remote start modules use a rolling code protocol between the fob and the control module. When the fob battery dies completely, the rolling code counter in the transmitter resets, putting it out of sync with the module. Pressing the start button will appear to do nothing — the module receives the signal but rejects the code. Re-enter programming mode on the control module, then press the button sequence on the fob to re-establish sync; the exact steps vary by installer but typically involve turning the ignition to the on position two to three times within five seconds.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically around 3.6V — not full charge. At storage voltage, RF transmit power from the fob is slightly lower than at a full 4.2V, which shortens usable range. This is not a fault with the cell or the fob. Charge the fob fully via the vehicle's charging cable or cradle before judging range; after one complete charge cycle, output voltage stabilises and range returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113709146,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113741914,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113774682,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331"},{"product_id":"astrostart-rss-5225-replacement-battery-37v-120mah-li-polymer","title":"Astrostart RSS 5225 Remote Start Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAstrostart RSS 5225 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 120mAh lithium-polymer battery replaces the internal cell in the Astrostart RSS 5225 remote start and keyless entry transmitter. It fits the handheld fob used to remotely start your vehicle and control door locks from a distance. Swap it in when the original cell can no longer hold a charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRSS 5225 transmitter fit:\u003c\/strong\u003e\n    The RSS 5225 fob runs a 3.7V Li-Polymer cell at this exact footprint — 24.70 x 20.30 x 3.70mm. The connector orientation and cell dimensions match the OEM slot directly, so no adapter or modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge cycles and confirmed the BMS accepts a full charge without triggering over-voltage cutoff. Discharge behaviour across the transmitter's RF transmission bursts stayed consistent throughout testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after power interruption:\u003c\/strong\u003e\n    After replacing this battery, the RSS 5225 remote will need to be re-paired to the control module. Astrostart aftermarket systems lose their rolling code sync when the remote loses power — run the system's programming sequence before testing range.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the battery interrupts power to the transmitter's memory, which clears the rolling code sync between the fob and the control module. The module will not respond to commands it cannot validate. You need to run the RSS 5225 programming sequence — typically triggered via the valet button on the control module — before the remote start function will fire again. Check the system manual for the exact button press count and timing for your installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically around 3.6V, not the 3.7V operating peak. At storage voltage, RF output from the transmitter is slightly lower, which shortens effective range. This corrects itself after the battery completes one or two full charge cycles inside the fob. Charge the remote fully before testing maximum range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113807450,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113840218,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113872986,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331"},{"product_id":"compustar-2w901r-ss-replacement-battery-37v-210mah-li-polymer","title":"Compustar 2W901R-SS Compatible Battery 3.7V 210mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCompustar 2W901R-SS — 3.7V Li-Polymer Replacement Battery (JHY190507)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 210mAh Li-Polymer battery replaces the internal power cell in the Compustar 2W901R-SS remote start and keyless entry transmitter. It fits the slim two-way transmitter used to remotely start vehicles and control door locks from a distance. Swap it when the remote stops responding or shows a low-battery indicator on the LCD screen.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2W901R-SS transmitter fit:\u003c\/strong\u003e\n    The 2W901R-SS uses a sealed Li-Polymer cell because the slim form factor leaves no room for a coin cell. The JHY190507 matches the original footprint at 29.10 × 22.80 × 3.50mm, so the cell seats flat without pressure on the PCB.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against a 2W901R-SS transmitter and confirmed the BMS accepted the charge cycle without fault flags. RF output held steady across the full discharge curve from 4.2V down to the 3.0V cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap transmitter re-sync:\u003c\/strong\u003e\n    After any power interruption to the 2W901R-SS, the transmitter loses its link to the control module. Follow Compustar's programming sequence — typically holding the lock button within range of the module — before expecting remote start or entry commands to work.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery breaks the transmitter's rolling-code sync with the Compustar control module. The module stops accepting commands from an unrecognised transmitter as a security measure. Re-enter programming mode on the control module — usually by cycling the ignition a set number of times — then press the remote's start button when prompted. Once the module confirms the code, the remote start function returns at full range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlarm triggering during battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Compustar control module can interpret a sudden loss of transmitter signal as a tamper event, especially if the vehicle was armed when you opened the remote. The siren or horn activates because the module sees no disarm command before the power drop. Use the system's dedicated disarm sequence — typically pressing the brake pedal and turning the ignition to the ON position — to silence the alarm. Do this before replacing the battery if the vehicle is in an armed state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113905754,"sku":"BWCS-CPW291SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113938522,"sku":"BWCS-CPW291SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113971290,"sku":"BWCS-CPW291SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPW291SL-1.webp?v=1779760313"},{"product_id":"compustar-pro-rfx-t2-replacement-battery-37v-150mah-li-polymer","title":"Compustar Pro RFX T2 Replacement Battery 3.7V 150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCompustar Pro RFX T2 Series — 3.7V Li-Polymer Replacement Battery (JHY442027)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 150mAh Li-Polymer battery for the Compustar Pro RFX T2 wireless remote transmitter. It fits the Pro RFX T2, Pro RFX-P2WT12, RFX-P2WT12-SS, and P2WT11-SS remotes, along with additional models in the same family. When the original cell loses charge capacity, this replacement restores full remote start and keyless entry function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro RFX platform compatibility:\u003c\/strong\u003e\n    These remotes share the same compact Li-Polymer cell format, 3.7V supply rail, and JHY442027 footprint across the lineup. The BMS on each unit uses the same charge termination logic, so one cell spec covers the full group 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 charge and discharge on the Pro RFX platform and confirmed the BMS accepted charge termination cleanly at 4.2V, with no false over-voltage flags or cutoff errors during draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after power interruption:\u003c\/strong\u003e\n    Swapping the battery cuts power to the remote's memory. The Pro RFX T2 requires a programming sequence to re-pair with the control module — follow the Compustar sync procedure specific to your installed firmware version before testing range.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the battery clears the remote's stored pairing data. The control module no longer recognises the transmitter until the sync sequence is completed. On most Compustar Pro RFX installations, this means entering the module's programming mode via the vehicle's ignition cycle and pressing the remote button within the pairing window. Check your installer's configuration sheet for the exact step count — sequence length varies by firmware.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced transmission range in the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell ships at storage voltage, typically around 3.6V — below the 3.7V nominal operating point. At that voltage, transmit power from the RF module is slightly reduced, which shortens effective range. After two or three full charge cycles, the cell reaches stable operating voltage and range returns to normal. Charge the remote fully before testing range — measure improvement after the second full charge, not the first.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416114004058,"sku":"BWCS-CPW112SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416114036826,"sku":"BWCS-CPW112SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416114069594,"sku":"BWCS-CPW112SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPW112SL-1.webp?v=1779760313"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-VPR756SL-6.webp?v=1780879122","url":"https:\/\/batteryweb.com\/collections\/remote-start-and-entry-systems.oembed","provider":"BatteryWeb","version":"1.0","type":"link"}