{"product_id":"vodafone-v720-replacement-battery-37v-750mah-li-ion","title":"Vodafone V720 HBU570 Replacement Battery 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVodafone V720 \/ V725 Series — 3.7V Li-ion Replacement Battery (HBU570)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 750mAh Li-ion replacement battery for the Vodafone V720, V725, VF720, and VF725 smartphones. It replaces OEM parts HBU570 and HBL4AHU. The cell sits in a compact 50.13 × 35.81 × 15.33mm form factor to match the original bay dimensions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV720 and V725 platform fit:\u003c\/strong\u003e\n    The V720 and VF725 share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers all four model variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a V720 unit and confirmed the BMS accepted charge without fault codes, voltage held steady under simultaneous screen and modem load, and the protection circuit tripped correctly at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging begins on an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the V720 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe V720's fuel gauge IC holds a discharge model calibrated to the old cell's internal resistance profile. A new cell with different impedance hits a voltage cliff under modem transmit or screen load that the gauge doesn't predict. The phone interprets the voltage drop as a fault and shuts down, even though the percentage shown looked safe. One full discharge cycle to automatic shutdown — then a full charge — resets the coulomb counter against the new cell and eliminates the false cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically in the first few days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eErratic percentage readings after a cell swap mean the fuel gauge IC is still running the previous cell's charge curve. The coulomb counter loses sync when it encounters a cell with a different capacity or self-discharge rate than what it modelled. This is not a fault with the replacement cell — it resolves after one or two complete charge cycles. Let the phone discharge to auto-shutdown naturally, then charge uninterrupted to 100% to anchor the new calibration point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405097926746,"sku":"BWCS-HU1300SL-1","price":23.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405097959514,"sku":"BWCS-HU1300SL-2","price":26.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405097992282,"sku":"BWCS-HU1300SL-3","price":28.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HU1300SL-big.webp?v=1779369956","url":"https:\/\/batteryweb.com\/products\/vodafone-v720-replacement-battery-37v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}