{"product_id":"alarmcom-video-doorbell-replacement-battery-37v-500mah-li-polymer","title":"Alarm.com Video Doorbell 3795 Replacement Battery 3.7V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlarm.com ADC-VDB770 \/ C-VDB770 Video Doorbell — 3.7V Li-Polymer Replacement Battery (3795)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 500mAh Li-Polymer battery replaces part number 3795 in the Alarm.com Video Doorbell lineup. It fits the ADC-VDB770, ADC-VDB770-S, and C-VDB770 Touchless Video Doorbell models. At 32.40 × 29.50 × 6.00mm, the cell matches the original footprint exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eADC-VDB770 and C-VDB770 platform:\u003c\/strong\u003e\n    These models share the same voltage rail, connector pinout, and BMS handshake requirements — one cell covers all variants listed. The 3795 part number is common across the touchless and standard ADC-VDB770 hardware revisions.\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 on the ADC-VDB770 platform and monitored BMS communication during motion-triggered recording events. The protection circuit held voltage within spec across combined IR LED and processor load spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install power cycle:\u003c\/strong\u003e\n    After fitting this cell, power cycle the doorbell once through the Alarm.com app. The firmware must register the new cell before the motion recording log syncs correctly to cloud storage — skipping this step can cause missed clips after the first trigger.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eADC-VDB770 going offline in the Alarm.com app after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the original cell drops below the BMS re-entry threshold, the doorbell loses its session token with the Alarm.com cloud. Fitting a fresh battery restores power, but the firmware does not automatically re-establish that token. The camera appears online at the hardware level but shows as offline or unresponsive in the app. Re-adding the device through the Alarm.com app — or triggering a soft reset via the doorbell's reset button — forces a new token handshake and clears the offline status.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eApp reporting 0% or incorrect charge level after installing the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ADC-VDB770 uses a voltage-threshold indicator, not a fuel gauge IC — it reads state-of-charge from cell voltage at fixed reference points, not from charge tracking. When a new cell first powers the unit, the firmware reads voltage mid-ramp and may display 0% or an arbitrary figure. Run one full charge cycle to 4.2V and let the doorbell discharge through normal operation — the indicator recalibrates against the new cell's voltage curve and displays an accurate percentage from that point forward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377766301786,"sku":"BWCS-ARV795BT-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377766334554,"sku":"BWCS-ARV795BT-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377766367322,"sku":"BWCS-ARV795BT-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ARV795BT-1.webp?v=1778772243","url":"https:\/\/batteryweb.com\/products\/alarmcom-video-doorbell-replacement-battery-37v-500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}