{"product_id":"nubia-z17-mini-replacement-battery-385v-3000mah-li-polymer","title":"Nubia Z17 Mini Replacement Battery 3.85V 3000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNubia Z17 Mini — 3.85V Li-Polymer Replacement Battery (Li3932T44P6h796137)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3000mAh Li-Polymer replacement battery for the Nubia Z17 Mini, Z17 Mini Standard Edition, Z17 Mini Standard Edition Dual SIM TD-LTE, and NX569J. It carries OEM part number Li3932T44P6h796137 and matches the original cell dimensions at 78.56 x 60.90 x 3.70mm. Capacity is rated at 11.55Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZ17 Mini and NX569J compatibility:\u003c\/strong\u003e\n    These models share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell covers all variants listed without modification or adapter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Z17 Mini unit and confirmed the BMS accepted the cell on first power-on, charge termination triggered correctly at 4.35V, and the protection circuit tripped as expected under overcurrent load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC pushes high current into an uncalibrated cell — skipping this step causes erratic percentage readings in the first 48 hours.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Z17 Mini reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Z17 Mini uses a coulomb counter IC that stores a learned discharge model of the original cell. When a new cell goes in, that stored model no longer matches actual cell behaviour — the IC keeps reading against old calibration data. This causes the percentage display to lag, jump, or plateau at values that don't reflect true charge state. One full discharge-to-shutdown and uninterrupted charge-to-100% cycle forces the IC to rebuild its model against the new cell curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display draws a current spike that the cell cannot sustain without the terminal voltage dropping below the BMS cutoff threshold — typically around 3.0V under load. The OS percentage reads mid-range, but under real load the cell voltage collapses faster than the fuel gauge updates. After the shutdown, plug in immediately and confirm the charge indicator activates — if it does, the cell is functional and the fuel gauge IC simply needs a full calibration cycle to correct its low-voltage threshold model.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392040861786,"sku":"BWCS-ZTN171SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392040894554,"sku":"BWCS-ZTN171SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392040927322,"sku":"BWCS-ZTN171SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTN171SL-1.webp?v=1779143086","url":"https:\/\/batteryweb.com\/products\/nubia-z17-mini-replacement-battery-385v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}