{"product_id":"zte-blade-z-max-replacement-battery-385v-4050mah-li-polymer","title":"ZTE Blade Z Max Li3940T44P8h937238 Replacement Battery 3.85V 4050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZTE Blade Z Max \/ Z982 — 3.85V Li-Polymer Replacement Battery (Li3940T44P8h937238)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4050mAh lithium-polymer replacement battery for the ZTE Blade Z Max (Z982) smartphone. It matches the OEM part number Li3940T44P8h937238 and fits the original battery compartment at 92.30 × 71.56 × 3.45mm. Swap it in when the original cell no longer holds enough charge for daily use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBlade Z Max \/ Z982 compatibility:\u003c\/strong\u003e\n    Both model names refer to the same hardware platform. They share the same battery connector, voltage rail, and BMS handshake, so one cell covers both designations without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Z982 unit and confirmed the BMS accepted the new cell, reported state-of-charge correctly after one full cycle, and held voltage above 3.6V under combined screen and LTE modem load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge recalibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter 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 Z982 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Z982's fuel gauge IC stores a learned discharge curve from the original cell. A new cell with a different internal resistance profile can hit a voltage cliff — where cell voltage drops below the BMS cutoff threshold — while the OS still reads 20–30% remaining. The phone shuts off not because the new cell is faulty, but because the gauge IC hasn't recalibrated yet. One full discharge from 100% to automatic power-off, followed by a full charge, resets the coulomb counter to match the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle after a cell swap, the Z982's charge IC may default to slow 5V\/1A charging instead of engaging the faster protocol. This happens because the charge IC runs a brief negotiation handshake on first contact with a new BMS, and some chargers time out before that handshake completes. Use the original ZTE wall adapter — not a third-party USB-PD charger — for the first full charge. Fast charging typically activates normally from the second cycle onward once the BMS has completed its initialisation sequence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392048234586,"sku":"BWCS-ZTZ982SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392048267354,"sku":"BWCS-ZTZ982SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392048300122,"sku":"BWCS-ZTZ982SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTZ982SL-1.webp?v=1779143125","url":"https:\/\/batteryweb.com\/products\/zte-blade-z-max-replacement-battery-385v-4050mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}