{"product_id":"jvc-gr-df420-replacement-battery-74v-1500mah-li-ion","title":"BN-VF714 JVC GR-DF420 Replacement Battery 7.4V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJVC GR-DF420 \/ GR-D Series — 7.4V Li-ion Replacement Battery (BN-VF714)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 1500mAh Li-ion battery replaces the BN-VF714 in JVC MiniDV camcorders including the GR-DF420, GR-D290AH, GR-D275, GR-D250US, and over 30 additional GR-D and GR-DF series models. It slots into the same battery bay and connects via the same three-contact interface as the original JVC cell. Voltage and capacity match OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGR-D and GR-DF series compatibility:\u003c\/strong\u003e\n    These camcorders share a common 7.4V battery platform across the GR-D and GR-DF lines. The three-pin connector carries both power and BMS data on the same rail, so voltage tolerance and contact alignment matter — this cell meets both.\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 the GR-DF420 body. The BMS accepted the cell without error flags, the battery-remaining indicator tracked through the discharge curve, and the protection circuit tripped cleanly at low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge cycle on MiniDV bodies:\u003c\/strong\u003e\n    Insert the new cell and run a full charge inside the camcorder body before your first recording session. The GR-D series BMS calibrates its remaining-charge display from the first in-body charge cycle — skipping this can cause the indicator to read incorrectly for the first several uses.\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-DF420 shows a dead-battery indicator on a partially charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eJVC's BMS on the GR-D and GR-DF series maps its fuel gauge against a discharge curve stored from the cell's first full charge cycle. A new replacement cell hasn't yet provided that reference data, so the camera defaults to a conservative low-battery reading even when the cell is at 60–70% charge. This isn't a fault with the cell — it's the BMS running without calibration data. One complete charge-to-full cycle inside the camera body writes the reference curve, and the indicator tracks accurately from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the GR-DF420 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the remaining-charge percentage jumps — say, from 80% to 40% and back — within a short recording window, the BMS voltage-threshold map is misaligned with the new cell's discharge curve. Li-ion cells from different manufacturers have slightly different mid-discharge voltage profiles, and the GR-D series indicator can misread those plateaus. Discharge the cell fully until the camera shuts off on low-battery cutoff, then charge completely to 8.4V without interruption. That full cycle resets the threshold calibration and stabilises the display.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333879529562,"sku":"BWCS-JVF714U-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333879562330,"sku":"BWCS-JVF714U-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333879595098,"sku":"BWCS-JVF714U-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JVF714U_1.webp?v=1778213541","url":"https:\/\/batteryweb.com\/products\/jvc-gr-df420-replacement-battery-74v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}