{"product_id":"dji-osmo-action-replacement-battery-385v-1250mah-li-ion","title":"DJI Osmo Action AB1 Replacement Battery 3.85V 1250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDJI Osmo Action — 3.85V Li-ion Replacement Battery (AB1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 1250mAh Li-ion replacement cell for the DJI Osmo Action camera. It fits the Osmo Action body directly and matches the OEM part number AB1. Capacity is 4.81Wh — identical to the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOsmo Action platform fit:\u003c\/strong\u003e\n    The Osmo Action uses a single-cell Li-ion pack with a BMS handshake that checks voltage signature and connector polarity at boot. This cell matches both, so the camera body accepts it through the standard power-on sequence without 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 an Osmo Action body. The BMS logged correct cell voltage at each reporting interval and did not flag a protection fault at any point during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle initialisation on the Osmo Action:\u003c\/strong\u003e\n    Charge this cell fully inside the camera body or OEM charger before your first shoot. The Osmo Action maps its battery-remaining display to a discharge curve — one full charge cycle from within the camera body lets the BMS calibrate that curve correctly for accurate percentage readout.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOsmo Action showing dead battery icon on a replacement cell that still has charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Osmo Action reads cell voltage at boot and maps it to a preset discharge curve stored in the BMS. A new replacement cell that has partially self-discharged during storage may present a resting voltage the camera interprets as critically low. This is a voltage-threshold mismatch, not a dead cell. Place the battery in the OEM charger first and bring it to full charge — once it reads 4.35V at the terminals, the camera will boot and report correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or resetting erratically during recording\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Osmo Action's fuel gauge estimates remaining capacity by tracking voltage drop against its internal discharge curve. A new cell has a slightly different discharge profile than the aged OEM cell the curve was calibrated for — this causes the percentage counter to jump at voltage inflection points. The fix is one full charge-to-discharge cycle so the BMS can re-anchor its curve to the new cell's actual voltage behaviour. After that cycle, percentage readout stabilises and tracks linearly down from 100%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333626527834,"sku":"BWCS-DJS100MC-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333626560602,"sku":"BWCS-DJS100MC-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333626593370,"sku":"BWCS-DJS100MC-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DJS100MC-1.webp?v=1778212975","url":"https:\/\/batteryweb.com\/products\/dji-osmo-action-replacement-battery-385v-1250mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}