{"product_id":"zte-mono-mo-01j-replacement-battery-38v-2400mah-li-polymer","title":"ZTE Mono MO-01J Replacement Battery 3.8V 2400mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZTE Mono MO-01J \/ MO-01K — 3.8V Li-Polymer Replacement Battery (Li3824T43P8H655845)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2400mAh Li-Polymer cell built to replace the original Li3824T43P8H655845 battery. It fits the ZTE Mono MO-01J, MO-01J TD-LTE, MO-01K, and MO-01K TD-LTE smartphones. Dimensions are 64.00 × 57.70 × 4.16mm — matching the original footprint in the battery bay.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMO-01J and MO-01K platform fit:\u003c\/strong\u003e\n    Both the MO-01J and MO-01K series share the same battery bay geometry, connector pinout, and BMS handshake protocol. One cell covers all four 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 through full charge and discharge sequences on the MO-01J platform. The BMS accepted the cell on first recognition, charge termination triggered correctly at 4.35V, and protection cutoff engaged at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one complete discharge-to-charge cycle before resuming normal use. The fuel gauge IC on these devices calibrates against the cell's discharge curve — skipping this step causes the percentage readout to lag or jump until the IC resets its coulomb counter baseline.\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 MO-01J after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still running the discharge model it built for the degraded original cell. A worn cell has a compressed voltage curve, so the IC shifts cutoff high to compensate. When a new cell with a full voltage range is installed, the IC triggers shutdown early — the phone cuts out well before the cell is actually depleted. The fix is one full discharge cycle from 100% to automatic shutdown, then a full charge without interruption. After that cycle, the coulomb counter resets its reference point against the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement battery sat in storage\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage, and if the cell drops below approximately 2.5V, the BMS enters lockout mode to prevent cell damage — the phone will not respond to the power button or show a charging indicator. Connect the phone to a wall charger, not a USB port, and leave it for 15–20 minutes without attempting to power it on. The charge IC on the MO-01J will trickle current into the cell at a reduced rate until it clears the BMS recovery threshold, at which point normal charging resumes. If there is still no response after 30 minutes on a wall charger, check that the battery connector is fully seated.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392003244122,"sku":"BWCS-ZTM100SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392003276890,"sku":"BWCS-ZTM100SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392003309658,"sku":"BWCS-ZTM100SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTM100SL-1.webp?v=1779142875","url":"https:\/\/batteryweb.com\/products\/zte-mono-mo-01j-replacement-battery-38v-2400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}