{"product_id":"vodafone-vda-replacement-battery-37v-4200mah-li-ion","title":"Vodafone PH26B Smartphone Replacement Battery 3.7V 4200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVodafone VDA \/ VPA III Series — 3.7V Li-ion 4200mAh Replacement Battery (PH26B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion battery rated at 4200mAh (15.54Wh), built to fit the Vodafone VDA, v1620, and VPA III smartphones. It replaces OEM part numbers PH26B and AHTXDSSN. If your original cell has degraded, swells, or no longer holds a charge, this unit slots in as a direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVDA \/ v1620 \/ VPA III compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions, connector pinout, and BMS communication protocol — 84.78 × 58.32 × 11.68mm with identical voltage rails. One cell fits all three without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a VDA unit and monitored BMS handshake, charge acceptance, and cutoff behaviour across a full cycle. The protection circuit triggered correctly at both the high-voltage and low-voltage thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging is introduced.\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 a fresh VDA cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. When the modem fires at full power or the screen brightness spikes, the new cell's actual voltage drops below the emergency cutoff threshold faster than the gauge predicts. The phone cuts out even though the reported percentage looks safe. Run one full discharge to 3.0V under normal use, then charge to 100% — the coulomb counter resets and shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VDA's fuel gauge IC stores a learned capacity model from the old cell. After a swap, the stored model no longer matches the new cell's actual charge-voltage curve, so percentage readings can jump 10–15 points in either direction. This is not a faulty cell — it is an uncalibrated gauge. Complete two full discharge-charge cycles at the standard charge rate without interrupting either cycle. After the second cycle, readings stabilise to within 3–5% accuracy.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409439293530,"sku":"BWCS-PH26BDL-1","price":40.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43409439326298,"sku":"BWCS-PH26BDL-2","price":46.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43409439359066,"sku":"BWCS-PH26BDL-3","price":51.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PH26BDL-big.webp?v=1779579689","url":"https:\/\/batteryweb.com\/products\/vodafone-vda-replacement-battery-37v-4200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}