{"product_id":"o2-xda-star-replacement-battery-37v-1200mah-li-polymer","title":"O2 XDA Star Replacement Battery 3.7V 1200mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eO2 XDA Star — 3.7V Li-Polymer Replacement Battery (NIKI160)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh Li-Polymer cell for the O2 XDA Star Windows Mobile smartphone. It replaces OEM part numbers NIKI160, 35H00103-00M, and 35H00103-01M. The XDA Star uses a slim pouch-style cell measuring 44.36 × 46.50 × 6.38mm — fitment depends on matching all three dimensions, not just voltage.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXDA Star compatibility:\u003c\/strong\u003e\n    The XDA Star platform uses a dedicated battery bay sized for this exact cell footprint. The BMS connector pinout carries voltage, ground, and a thermistor line — all three are present on this replacement cell, so the handshake with the Windows Mobile charge IC completes correctly.\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 XDA Star platform. The BMS engaged cutoff cleanly at the low-voltage threshold, and the charge IC accepted the cell without fault flags on the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to automatic shutdown followed by an uninterrupted charge to 100% before normal use. The XDA Star's fuel gauge IC was calibrated to the original cell's discharge curve — one complete cycle resets the coulomb counter against the new cell's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XDA Star reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe XDA Star uses a fuel gauge IC that tracks charge by counting coulombs against a stored discharge curve from the original cell. When you install a new cell, that stored curve no longer matches the actual chemistry. The IC will read percentage from the wrong baseline, so the displayed figure can be off by 15–25%. One full discharge-to-shutdown followed by a full uninterrupted charge forces the IC to re-anchor its end points and recalculate the curve against the new cell.\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 fuel gauge IC has not yet recalibrated and the cell voltage drops below the BMS protection threshold under load — typically during a call or screen-on burst — before the displayed percentage reaches zero. The cell voltage at shutdown is usually around 3.2–3.3V, which is the BMS cutoff floor. Complete the recalibration cycle first: discharge fully until the phone shuts itself off, then charge to 100% without interruption. After that cycle, the percentage readout and the actual cell voltage will track together correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405187612762,"sku":"BWCS-TP5500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405187645530,"sku":"BWCS-TP5500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405187678298,"sku":"BWCS-TP5500SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TP5500SL-1.webp?v=1779370333","url":"https:\/\/batteryweb.com\/products\/o2-xda-star-replacement-battery-37v-1200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}