{"product_id":"blu-neo-x-replacement-battery-37v-1450mah-li-ion","title":"BLU Neo X C825837200L Replacement Battery 3.7V 1450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU Neo X \/ N070u — 3.7V Li-ion Replacement Battery (C825837200L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1450mAh (5.37Wh) Li-ion battery for the BLU Neo X and N070u smartphones. It replaces OEM part C825837200L. The cell matches the original's physical dimensions — 82.02 × 57.75 × 3.22mm — so it seats correctly in the battery bay without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNeo X and N070u compatibility:\u003c\/strong\u003e\n    Both model designations share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers both variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full charge-discharge sequence on a Neo X unit. The BMS accepted the cell without fault flags, and the charge IC reached termination voltage correctly at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\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 the new cell's discharge curve before high-current charging begins on an uncalibrated state-of-charge register.\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 BLU Neo X after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still reading the old cell's voltage-to-capacity curve. When the modem fires up during a call or the screen hits full brightness, current draw spikes and the new cell's terminal voltage drops faster than the IC expects. The phone interprets this as a critical low-voltage event and shuts down — even though the displayed percentage read 20% or higher. Run one full discharge to below 5% followed by an uninterrupted charge to 100% to push the coulomb counter through a complete calibration cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLU Neo X not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell voltage dropped below approximately 2.5V, the BMS enters a lockout state to prevent unsafe charging of a deeply discharged cell. Plugging straight into a fast charger won't override this — the BMS will block the charge path. Connect to a low-current USB source, such as a PC USB-A port, for 15–20 minutes first. This trickle input nudges the cell voltage above the BMS recovery threshold, typically around 2.9V, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392037060698,"sku":"BWCS-BLN070SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392037093466,"sku":"BWCS-BLN070SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392037126234,"sku":"BWCS-BLN070SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLN070SL-1.webp?v=1779143085","url":"https:\/\/batteryweb.com\/products\/blu-neo-x-replacement-battery-37v-1450mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}