{"product_id":"htc-replacement-battery-37v-1350mah-li-ion","title":"HTC 35H00159-01M Replacement Battery 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ehtc 35H00159-01M — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1350mAh (5Wh) Li-ion cell is a direct swap for the original htc battery identified by part number 35H00159-01M. It restores power to htc smartphones where the original cell no longer holds charge. Voltage and physical dimensions — 65 x 44 x 4.50mm — match the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM part number match:\u003c\/strong\u003e\n    The 35H00159-01M designation ties this cell to a specific connector pinout and BMS handshake profile. Using a cell with the wrong part number can cause the fuel gauge IC to reject voltage readings or refuse charging protocol negotiation entirely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full discharge and charge sequence on compatible htc hardware, confirming BMS acceptance, charge termination at the correct cutoff voltage, and stable voltage delivery under screen and modem 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 and complete one full discharge-charge cycle. This allows the fuel gauge IC to map the new cell's discharge curve before high-current charging pushes current into 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\"\u003eWhy the phone reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on htc smartphones tracks charge state using a coulomb counter calibrated to the original cell's discharge curve. When you install a new cell, that stored curve no longer matches actual cell behaviour. The IC outputs percentage readings based on stale data until it relearns the new curve. One complete discharge down to auto-shutdown followed by a full charge corrects this — the IC rebuilds its reference map from the new cell's actual voltage profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the BMS protection threshold under peak load — typically during simultaneous modem activity and screen brightness spikes. The displayed percentage looks safe, but the cell cannot sustain voltage at that load level, so the BMS cuts power instantly. It is not a faulty cell — it is an uncalibrated fuel gauge reading a new cell as if it were the old one. Complete the first full discharge-charge cycle and confirm resting voltage reads at or above 3.85V before continuing normal use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405096845402,"sku":"BWCS-HT3213SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405096878170,"sku":"BWCS-HT3213SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405096910938,"sku":"BWCS-HT3213SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HT3213SL-1.webp?v=1779369955","url":"https:\/\/batteryweb.com\/products\/htc-replacement-battery-37v-1350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}