{"product_id":"braven-brv-1m-replacement-battery-37v-3400mah-li-ion","title":"Braven BRV-1M Replacement Battery 3.7V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBraven BRV-1M — 3.7V Li-ion Replacement Battery (BRV-1M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3400mAh Li-ion cell replaces the original battery in the Braven BRV-1M portable Bluetooth speaker. It restores cordless audio playback when the factory cell has degraded or failed. Capacity is 12.58Wh, matching the original power envelope for the BRV-1M's amplifier and Bluetooth radio.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBRV-1M platform fit:\u003c\/strong\u003e\n    The BRV-1M uses a single flat Li-ion cell at 3.7V nominal to power both the Bluetooth radio and the Class D amplifier from one shared rail. This replacement cell matches that rail voltage and connector orientation so the onboard BMS can communicate correctly with the charge controller.\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 BRV-1M board. The BMS accepted the cell without fault codes, the charge indicator stepped through all stages cleanly, and the amplifier drew current across the full output range without triggering a low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset on first use:\u003c\/strong\u003e\n    After fitting this cell, run the BRV-1M down until it powers off, then charge it uninterrupted to 100% before using it again. Skipping this step leaves the fuel gauge calibrated to the old cell's degraded capacity and the indicator will read inaccurately from day one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCapacity fade on the BRV-1M from constant top-off charging\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eMost BRV-1M owners charge the speaker on a desk between every use, often plugging in after only 20–30% discharge. Li-ion cells kept near full charge continuously experience accelerated cathode stress, which reduces usable capacity over months. The fuel gauge also drifts — the speaker may show a full bar while the actual cell capacity is significantly lower. To slow this, let the cell drop below 20% at least once a month before recharging fully.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAudio distorting before the battery indicator reaches empty\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BRV-1M's amplifier pulls peak current during loud passages, which causes the cell voltage to sag below the amplifier's clean operating threshold before the fuel gauge triggers the low-battery warning. This appears as crackling or clipping at higher volumes when the battery looks half full. It is a voltage sag issue, not a speaker fault. Charging to full and checking that the replacement cell holds above 3.5V under load will confirm whether the old cell was the cause.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416219615322,"sku":"BWCS-BRM100SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416219648090,"sku":"BWCS-BRM100SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416219680858,"sku":"BWCS-BRM100SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BRM100SL-1.webp?v=1779760990","url":"https:\/\/batteryweb.com\/products\/braven-brv-1m-replacement-battery-37v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}