{"product_id":"htc-one-x9-replacement-battery-385v-3000mah-li-polymer","title":"HTC One X9 B2PS5100 Replacement Battery 3.85V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHTC One X9 Series — 3.85V Li-Polymer Replacement Battery (B2PS5100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3000mAh (11.55Wh) Li-Polymer cell replacing the original B2PS5100 in the HTC One X9, One X9E, One X9u, and One X9 Dual SIM. It fits the same footprint as the OEM cell at 76.50 × 67.90 × 3.40mm. When the original cell degrades and can no longer hold voltage under load, this cell restores full function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOne X9 variant compatibility:\u003c\/strong\u003e\n    The X9, X9E, X9u, and Dual SIM variants all share the same battery bay dimensions, connector pinout, and 3.85V nominal rail — the BMS handshake is identical across these builds, so one cell covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an HTC One X9 unit. The BMS accepted the cell cleanly, protection circuits triggered correctly at low-voltage cutoff, and the charge IC stepped through CC\/CV phases without fault.\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 allows the fuel gauge IC to recalibrate against the new cell's discharge curve before high-current charging is applied to 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\"\u003eSudden shutdown at 20–30% on the One X9 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe One X9's fuel gauge IC builds its percentage model from the old cell's discharge curve. A new cell has a different internal resistance profile, so the IC misjudges how much voltage remains under modem and display load. The phone hits a hard voltage floor — around 3.4V under peak draw — before the percentage reaches zero. One full discharge-charge cycle without fast charging gives the coulomb counter enough data to replot the curve against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after sitting in storage with a flat battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells that drop below approximately 2.5V per cell trigger a BMS lockout to prevent damage during recharge. The One X9 will show no response — no boot logo, no charge indicator — until the BMS is brought out of lockout. Connect to a wall charger, not a PC USB port, and leave it for 20–30 minutes without pressing the power button. Once the BMS detects safe voltage recovery, the charge indicator will appear and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392088473690,"sku":"BWCS-HTX900XL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392088506458,"sku":"BWCS-HTX900XL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392088539226,"sku":"BWCS-HTX900XL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTX900XL-1.webp?v=1779143685","url":"https:\/\/batteryweb.com\/products\/htc-one-x9-replacement-battery-385v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}