{"product_id":"nubia-z18-mini-dual-sim-replacement-battery-385v-3350mah-li-polymer","title":"Nubia Z18 mini Dual SIM Li3933T44P6h766343 Replacement Battery 3350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNubia Z18 mini Dual SIM \/ NX611J — 3.85V Li-Polymer Replacement Battery (Li3933T44P6h766343)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 3350mAh (12.9Wh) lithium-polymer cell replaces the original battery in the Nubia Z18 mini Dual SIM, Z18 mini Dual SIM TD-LTE, and NX611J. It matches the OEM part number Li3933T44P6h766343 and fits the stock battery bay without modification. Dimensions are 74.52 × 61.92 × 4.36mm — verify against your current cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZ18 mini \/ NX611J platform fit:\u003c\/strong\u003e\n    All three listed variants share the same physical footprint, connector pinout, and BMS handshake protocol. One cell covers the full model range without adapter or wiring change.\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 load conditions matching the Snapdragon 660 platform draw. The BMS held cutoff correctly at both the low-voltage floor and charge termination threshold — no false trips under screen-on or modem-active loads.\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 run one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on 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 Z18 mini reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe NX611J uses a fuel gauge IC that builds its capacity model from accumulated charge and discharge data on the original cell. When a new cell goes in, the IC still references that old curve — so the percentage it displays does not match actual remaining charge. This shows up as the indicator jumping several percent at once or the phone hitting 0% while the cell still has usable voltage. One full discharge to auto-shutdown followed by a complete charge resets the coulomb counter and re-anchors the gauge to the new cell's real capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff symptom, not a capacity fault. Under combined modem, screen, and CPU load, the cell voltage drops sharply at low state-of-charge — faster than the fuel gauge IC predicted — and the phone's protection circuit cuts power before the display percentage reaches zero. It typically resolves after two or three full discharge-charge cycles once the gauge IC recalibrates its end-of-discharge voltage model. If shutdowns persist past the third cycle, check that cell voltage at shutdown reads above 3.2V using a USB meter or diagnostics app — anything below 3.0V at cutoff points to a cell defect.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392013860954,"sku":"BWCS-ZTZ180SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392013893722,"sku":"BWCS-ZTZ180SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392013926490,"sku":"BWCS-ZTZ180SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTZ180SL-1.webp?v=1779142920","url":"https:\/\/batteryweb.com\/products\/nubia-z18-mini-dual-sim-replacement-battery-385v-3350mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}