{"product_id":"canon-dc51-replacement-battery-74v-850mah-li-ion","title":"Canon BP-308 Replacement Battery 7.4V 850mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCanon DC51 \/ Optura 600 \/ IXY DVM5 — 7.4V Li-ion Replacement Battery (BP-308)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 850mAh Li-ion battery replaces the Canon BP-308, BP-308B, and BP-308S cells. It fits the DC51, IXY DVM5, DMVX4i, and Optura 600 compact camcorders. Same dimensions at 62.90 × 40.32 × 9.67mm — it seats and latches exactly as the original does.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDC51 and Optura 600 platform compatibility:\u003c\/strong\u003e\n    These camcorders share the same BP-308 battery rail, connector pinout, and BMS handshake protocol. One cell covers all four models listed without any adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a Canon DC51 body and monitored BMS communication, charge acceptance, and cutoff behaviour. The protection circuit tripped correctly at both the high-end charge ceiling and the low-voltage discharge floor.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge cycle on Canon camcorders:\u003c\/strong\u003e\n    Insert the battery and run a full charge inside the Canon charger or camera body before your first shoot. Canon's BMS maps battery-remaining percentages against a discharge curve it learns on that first full cycle — skipping it causes the indicator to read inaccurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCanon BMS rejecting a third-party cell on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCanon camcorders in this range run an authentication check when a new cell is seated. A replacement cell that hasn't been through a full charge cycle in the Canon charger can trigger a rejection flag — the camera either displays a battery warning or refuses to power on. This isn't a fault with the cell itself. Connect the battery to the Canon charger, let it reach a full charge (indicator light goes solid), then insert it into the camera body. That single cycle clears the flag in most cases.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the DC51 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DC51's fuel gauge maps display segments against a fixed discharge voltage curve calibrated to the original BP-308 cell. A new replacement cell can have a slightly different discharge curve, causing the indicator to jump — showing 60%, then dropping to 20% after one short clip. This isn't the cell losing charge; it's the BMS recalibrating its internal model. Run two or three full charge-discharge cycles and the display stabilises as the camera's BMS adapts to the new cell's actual curve. After conditioning, the resting voltage at \"one bar\" should sit at approximately 7.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333879038042,"sku":"BWCS-BP308-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333879070810,"sku":"BWCS-BP308-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333879103578,"sku":"BWCS-BP308-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BP308-1.webp?v=1778213540","url":"https:\/\/batteryweb.com\/products\/canon-dc51-replacement-battery-74v-850mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}