{"product_id":"jvc-gr-d796-replacement-battery-74v-1500mah-li-ion","title":"JVC BN-VF815 Replacement Battery 7.4V 1500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJVC GR-D796 \/ GZ-HD40 Series — 7.4V Li-ion Replacement Battery (BN-VF815)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 1500mAh Li-ion cell replaces the BN-VF815 and BN-VF915 OEM batteries used across the JVC GR-D and GZ-HD camcorder lines. It fits the GR-D796, GR-D750, GZ-HD40, GZ-HD40AC, and over 235 additional JVC camcorder models sharing the same battery bay and connector pinout. Capacity is 1500mAh (11.1Wh), matching the original spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGR-D and GZ-HD platform compatibility:\u003c\/strong\u003e\n    JVC's mid-2000s compact camcorder lines share a common battery interface — same 7.4V rail, same physical latch, and same BMS communication protocol — which is why a single cell covers both the GR-D and GZ-HD chassis without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the GR-D796 body and the OEM charger. The BMS accepted the cell on first contact, reported charge state correctly, and held voltage above 7.0V through the full discharge curve without triggering a premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle initialisation on JVC camcorders:\u003c\/strong\u003e\n    Run the first charge cycle through the camera body rather than a third-party charger. JVC's BMS reads cell impedance during that initial in-body charge to calibrate the battery-remaining display — skipping this step can cause the indicator to read inaccurately for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GR-D796 battery indicator jumps erratically during playback\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eJVC's battery-remaining display maps percentage to voltage thresholds calibrated against the original cell's discharge curve. A new Li-ion cell has a flatter mid-range discharge curve than an aged original, so the camera's firmware reads the voltage differently and can jump — often skipping from 60% to 20% without warning. This isn't a cell fault. After two or three full charge-discharge cycles in the camera body, the BMS re-maps to the new cell's curve and the indicator stabilises. If it still jumps after three cycles, verify the charger is bringing the cell to a full 8.4V before removing it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGZ-HD40 showing \"no battery\" or refusing to power on with new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GZ-HD40 runs a handshake check between the camera body and the battery's protection circuit on every power-on. If the cell arrives in a deep storage state — below roughly 6.0V — the body will reject it rather than attempt to charge it. The fix is to place the cell in the OEM JVC charger rather than the camera body first; the charger applies a low-current pre-charge that brings the cell back above the acceptance threshold. Once the charger shows a solid charge light, install the cell in the camera body and power on normally. Do not leave the cell in deep discharge storage for extended periods between uses.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333880348762,"sku":"BWCS-JVF815U-1","price":33.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43333880381530,"sku":"BWCS-JVF815U-2","price":38.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43333880414298,"sku":"BWCS-JVF815U-3","price":41.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JVF815U-big.webp?v=1778213541","url":"https:\/\/batteryweb.com\/products\/jvc-gr-d796-replacement-battery-74v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}