{"product_id":"htc-one-s-replacement-battery-37v-1650mah-li-polymer","title":"HTC One S BJ40100 Replacement Battery 3.7V 1650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHTC One S \/ Ville Series — 3.7V Li-Polymer Replacement Battery (BJ40100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1650mAh lithium-polymer cell built to the same electrical specification as the original BJ40100 fitted to the HTC One S and Ville series. It fits the One S, Ville, Z560E, and Ville C. Swap it in when the original cell no longer holds a usable charge through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOne S \/ Ville platform compatibility:\u003c\/strong\u003e\n    The One S, Ville, Z560E, and Ville C all share the same chassis layout, connector pinout, and charge IC — meaning a single BJ40100-spec cell covers the full platform without any wiring or connector modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the One S charge IC and confirmed the BMS handshake completes correctly, charge termination triggers at the right voltage, and no false overcurrent trips occur during the first charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use, run one complete discharge to shutdown followed by a full uninterrupted charge with fast charging disabled. The One S fuel gauge IC reads the new cell's discharge curve during this cycle — skipping it causes percentage jumps and premature low-battery warnings for the first several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the One S shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe One S uses a coulomb counter that was calibrated to the degraded curve of the old cell. When a new cell with a steeper voltage cliff arrives, the system's state-of-charge estimate lags behind real capacity. Under modem or display load, the cell voltage drops faster than the fuel gauge predicts, and the protection circuit cuts power before the reported percentage reaches zero. One full discharge-charge cycle resets the coulomb counter's end-of-discharge reference point and brings percentage readings back into line.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells self-discharge in storage. If the BJ40100 shipped or sat unused below approximately 2.5V per cell, the BMS enters lockout to prevent damage and blocks normal startup. Connect the One S to a wall charger — not a PC USB port — and leave it for 15–20 minutes before attempting to power on. The charge IC on the One S delivers enough trickle current to pull the cell above the BMS re-enable threshold, which sits at roughly 2.9V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404327845978,"sku":"BWCS-HTZ560SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404327878746,"sku":"BWCS-HTZ560SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404327911514,"sku":"BWCS-HTZ560SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTZ560SL-1.webp?v=1779369761","url":"https:\/\/batteryweb.com\/products\/htc-one-s-replacement-battery-37v-1650mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}