{"product_id":"htc-p4350-replacement-battery-37v-2400mah-li-polymer","title":"HTC P4350 Replacement Battery 3.7V 2400mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHTC P4350 \/ Herald 100 — 3.7V Li-Polymer Replacement Battery (35H00078-02M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2400mAh Li-Polymer replacement battery for the HTC P4350 and Herald 100 smartphones. It matches the OEM part numbers 35H00078-02M and HERA160. Slot it in when the original cell has lost capacity or no longer holds a charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP4350 and Herald 100 compatibility:\u003c\/strong\u003e\n    Both devices run from the same 3.7V Li-Polymer cell with identical connector pinout and BMS handshake requirements. Swapping between these models is straightforward — same form factor at 116.04 × 68.62 × 3.40mm, same voltage rail.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the P4350 platform. The BMS accepted the handshake cleanly, charge current ramped correctly through CC\/CV stages, and no cutoff events triggered under normal screen-on load.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the P4350 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe P4350 uses a fuel gauge IC that builds its capacity model from previous charge and discharge cycles. When a new cell goes in, the IC is still referencing the old cell's discharge curve. The percentage shown on screen reflects that stale data, not the actual state of charge in the new cell. Running one full discharge down to auto-shutoff and a full uninterrupted charge resets the coulomb counter and brings the percentage readout back in line.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't finished recalibrating and the cell voltage drops steeply under modem or display load — a voltage cliff the old curve didn't predict. The phone's protection circuit trips before the UI percentage reaches zero. It is not a faulty cell. Charge the phone to 100%, let it drain to auto-shutoff without interruption, then recharge fully — after that cycle the IC maps the correct low-voltage knee and shutdowns at low percentage stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405227163738,"sku":"BWCS-DC800XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405227196506,"sku":"BWCS-DC800XL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405227229274,"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\/htc-p4350-replacement-battery-37v-2400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}