{"product_id":"motorola-mb860-replacement-battery-37v-1550mah-li-ion","title":"BH6X Motorola MB860 Replacement Battery 3.7V 1550mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola Atrix 4G \/ MB860 — 3.7V Li-ion Replacement Battery (BH6X)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1550mAh Li-ion cell replaces the original BH6X battery in the Motorola MB860, Atrix 4G, Olympus, and XT865. It fits directly into the same battery bay with the same connector and contact layout. Capacity matches the factory specification at 1550mAh (5.74Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMB860 \/ Atrix 4G platform fit:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, BH6X form factor, and contact pin arrangement. The BMS handshake on each uses the same NTC thermistor line, so the charge IC recognises this cell without flagging an authentication error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the MB860. The BMS accepted charging from the stock charger without triggering thermal cutoff, and the fuel gauge IC read voltage correctly across the full range after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first installation, run one full discharge to low battery warning, then charge uninterrupted to 100% before normal use. The Atrix 4G's coulomb counter calibrates its zero and full reference points during this first cycle — skipping it causes the gauge to report inaccurate percentages from the start.\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 Atrix 4G after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the discharge curve of the old, degraded cell. The new cell has a steeper voltage-versus-capacity curve, so the IC underestimates remaining charge and the phone hits the low-voltage cutoff earlier than the percentage shown. Under modem or display load, the cell voltage drops fast enough to trigger the hardware protection circuit before the OS can warn you. One full discharge-charge cycle lets the coulomb counter map the new cell's actual curve and correct the shutdown point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if the cell dropped below roughly 2.5V, the BMS enters lockout mode to prevent damage to the cell chemistry. The phone will show nothing — no charging indicator, no boot — because the BMS blocks current flow entirely at that voltage. Connect the original Motorola charger and leave it for 20–30 minutes without pressing any buttons; the charge IC applies a low-current pre-charge to bring the cell above the BMS recovery threshold, typically around 2.8V. Once the charging LED appears, the BMS has released lockout and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405091930202,"sku":"BWCS-MOB860SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405091962970,"sku":"BWCS-MOB860SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405091995738,"sku":"BWCS-MOB860SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MOB860SL-1.webp?v=1779369970","url":"https:\/\/batteryweb.com\/products\/motorola-mb860-replacement-battery-37v-1550mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}