{"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","url":"https:\/\/batteryweb.com\/products\/lectrosonics-ssm-transmitters-replacement-battery-37v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}