{"product_id":"vodafone-vpa-compact-iv-replacement-battery-37v-2400mah-li-polymer","title":"Vodafone VPA Compact IV Replacement Battery 3.7V 2400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVodafone VPA Compact IV — 3.7V Li-Polymer Replacement Battery (35H00078-02M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2400mAh Li-Polymer cell replaces the original battery in the Vodafone VPA Compact IV smartphone. It matches the OEM dimensions at 116.04 × 68.62 × 3.40mm and connects via the same flex-ribbon connector as the factory cell. Capacity is rated at 8.88Wh, matching what the VPA Compact IV's charge IC expects.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVPA Compact IV fitment:\u003c\/strong\u003e\n    The VPA Compact IV uses a fixed connector pinout and a charge IC tuned to a narrow voltage window. This cell sits within that window — 3.7V nominal, same as OEM — so the charge controller does not reject it on first contact.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a VPA Compact IV unit. The BMS accepted charge without flagging an error, and cell voltage held stable across screen-on and modem-active load states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting, disable fast charging if available and run one full discharge-to-charge cycle before normal use. The fuel gauge IC on the VPA Compact IV is calibrated to the old cell's discharge curve — one full cycle lets it remap against the new cell and report accurate percentages.\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 VPA Compact IV after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the discharge curve of the old, degraded cell. When the new cell hits a voltage point the old curve mapped to 20–30%, the phone interprets it as critically low and shuts down — even though the cell has capacity left. The fix is a full calibration cycle: drain the phone until it shuts itself off, then charge uninterrupted to 100%. After one complete cycle, the coulomb counter resets its endpoints against the new cell, and premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage. If the cell voltage dropped below 2.5V per cell, the BMS enters lockout mode to prevent damage — and the phone will not respond to the power button. Connect the phone to a wall charger, not a USB port, and leave it for 20–30 minutes without attempting to power on. Most BMS units on this platform will accept a trickle recovery charge once the cell climbs above 2.7V and will release the lockout automatically at that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405225984090,"sku":"BWCS-DC800XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405226016858,"sku":"BWCS-DC800XL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405226049626,"sku":"BWCS-DC800XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DC800XL_1.webp?v=1779370349","url":"https:\/\/batteryweb.com\/products\/vodafone-vpa-compact-iv-replacement-battery-37v-2400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}