{"product_id":"maxon-mx-x3-replacement-battery-37v-2600mah-li-polymer","title":"Maxon MX X3 Replacement Battery 3.7V 2600mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMaxon MX X3 — 3.7V Li-Polymer 2600mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2600mAh Li-Polymer cell replaces the original battery in the Maxon MX X3 and MX-X3 smartphone, including T-King-branded variants. It measures 83.60 × 64.00 × 4.25mm and matches the original connector and contact layout. Capacity figure is 9.62Wh as rated — use the product data, not third-party listings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMX X3 and T-King MX-X3 fitment:\u003c\/strong\u003e\n    Both the Maxon and T-King variants of this phone share the same chassis dimensions, connector pinout, and charge IC configuration, so one cell covers all four listed model strings without modification.\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 MX X3 platform and confirmed the BMS communicates correctly with the phone's fuel gauge IC — no rogue cutoff, no false full-charge flag on the first cycle.\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 for 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 runs into an uncalibrated state.\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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different voltage-versus-capacity curve than the aged cell the phone's fuel gauge IC learned on. When the modem fires a transmission burst or the screen peaks, the cell voltage briefly drops below the BMS cutoff threshold — even at what the OS reads as 25%. The fuel gauge IC has not yet correlated its coulomb counter to the new discharge curve, so it cannot predict the real remaining capacity. One full discharge-charge cycle without fast charging resets the calibration and eliminates most of these phantom shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone will not power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells in storage self-discharge over weeks. If the cell voltage drops below roughly 2.5V, the BMS enters a lockout state and blocks normal charge current to prevent thermal runaway on a deeply discharged cell. Plugging in and seeing no charging indicator is the tell. Apply a slow trickle charge — leave the phone connected to a low-power 5V USB source for 20 to 30 minutes before attempting a normal boot. Once the cell recovers above the BMS re-enable threshold, the charger IC resumes and the phone powers on normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404217122906,"sku":"BWCS-BLP104SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404217155674,"sku":"BWCS-BLP104SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404217188442,"sku":"BWCS-BLP104SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLP104SL-1.webp?v=1779369390","url":"https:\/\/batteryweb.com\/products\/maxon-mx-x3-replacement-battery-37v-2600mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}