{"product_id":"motorola-moto-x5-replacement-battery-385v-2850mah-li-polymer","title":"Motorola Moto X5 JX40 Replacement Battery 3.85V 2850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola Moto X5 — 3.85V Li-Polymer Replacement Battery (JX40)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2850mAh (10.97Wh) Li-Polymer battery for the Motorola Moto X5 smartphone. It replaces the original JX40 cell when the factory battery can no longer hold charge through a full day. It restores power to the processor, display, modem, and wireless radios.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMoto X5 fitment:\u003c\/strong\u003e\n    The JX40 cell uses a specific connector pitch and BMS handshake tied to the Moto X5 charge IC. Swapping a mismatched cell voltage — even by 0.1V nominal — causes the charge controller to reject the pack or throttle current from the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Moto X5 board and confirmed the BMS accepted the pack without charge-inhibit flags. The cell reached full charge termination at 4.35V and held cutoff voltage above 3.0V under sustained modem and screen load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one full discharge-to-charge cycle at standard rate. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current 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 Moto X5 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still running a discharge model calibrated to the old, degraded cell. The new cell hits a voltage cliff under modem or display load faster than the gauge predicts. The phone interprets that voltage drop as a hard cutoff and shuts down before the percentage reaches zero. One full slow discharge-to-charge cycle forces the coulomb counter to relearn the new cell's actual capacity curve and clears the mismatch.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after installation, the charge IC on the Moto X5 runs a trickle-charge verification pass before it negotiates a fast-charge protocol with the adapter. If the new cell's internal impedance reads high on that first pass — which is normal for a fresh cell at room temperature — the IC stays in standard charge mode for that cycle. This is not a fault with the battery or the adapter. Completing one full standard charge cycle is enough for the IC to clear the flag and re-enable fast-charge negotiation on the next plug-in.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391898124378,"sku":"BWCS-MOX500SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391898157146,"sku":"BWCS-MOX500SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391898189914,"sku":"BWCS-MOX500SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MOX500SL-1.webp?v=1779142596","url":"https:\/\/batteryweb.com\/products\/motorola-moto-x5-replacement-battery-385v-2850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}