{"product_id":"ambarella-a7ls-replacement-battery-37v-850mah-li-ion","title":"Ambarella A7LS Compatible Battery 3.7V 850mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmbarella A7LS — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 850mAh Li-ion cell for the Ambarella A7LS action camera. It replaces the original internal battery used for continuous video recording in dash cam and sports camera applications. Dimensions are 36.35 × 32.30 × 7.82mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA7LS platform fit:\u003c\/strong\u003e\n    The A7LS processor handles continuous H.264 encoding alongside sensor readout — both draw from the same 3.7V rail. This cell matches the original voltage and form factor so the board receives stable current during sustained recording bursts.\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 while monitoring BMS behaviour at the low-voltage cutoff. The protection circuit tripped cleanly at the expected threshold with no anomalous shutdowns during continuous load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on the A7LS:\u003c\/strong\u003e\n    Run one complete charge cycle through the camera body or OEM charger before heavy recording sessions. Some A7LS units recalibrate their fuel gauge against the new cell's discharge curve during that first cycle, which keeps the battery indicator accurate from the second session onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the A7LS battery indicator reads full then drops suddenly mid-clip\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe A7LS maps its battery-remaining display to a voltage-threshold table calibrated to the original cell's discharge curve. A new replacement cell — even one with identical chemistry — can have a slightly different voltage slope through the mid-range. The camera reads the new curve as \"full\" longer than expected, then drops several bars at once when voltage falls through a mapped threshold. One full charge-discharge cycle inside the camera body allows the firmware to re-anchor its reference points to the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCamera shows dead battery icon on a freshly charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when a replacement cell ships in a deep-discharge state — typically below 2.8V — and the A7LS BMS reads it as a failed or absent cell rather than a depleted one. Connect the battery to an OEM-compatible charger externally for 10–15 minutes to bring the cell above 3.0V before inserting it into the camera body. Once above that threshold, the camera will recognise the cell and accept a normal charge. If the camera still shows a dead battery icon after pre-charging, check that the cell contacts are fully seated and free of debris.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333707071578,"sku":"BWCS-RBS500MC-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333707104346,"sku":"BWCS-RBS500MC-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333707137114,"sku":"BWCS-RBS500MC-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-RBS500MC-1.webp?v=1778213032","url":"https:\/\/batteryweb.com\/products\/ambarella-a7ls-replacement-battery-37v-850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}