{"product_id":"blu-c5-replacement-battery-37v-2500mah-li-polymer","title":"BLU C5 Replacement Battery 3.7V 2500mAh C775840200L","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU C5 \/ C010Q — 3.7V Li-Polymer Replacement Battery (C775840200L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2500mAh Li-Polymer cell replaces OEM part C775840200L in the BLU C5 and C010Q smartphones. It matches the original pack's voltage rail, physical footprint (76.90 × 58.50 × 4.50mm), and connector orientation. Capacity is rated at 9.25Wh — identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC5 and C010Q platform fit:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, 3.7V nominal rail, and BMS handshake protocol — one cell covers both variants 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 full charge and discharge on a BLU C5 unit. The BMS accepted the pack without fault flags, and the charge IC completed the constant-current to constant-voltage transition cleanly at 4.2V.\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 and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts reporting accurate percentages.\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 C5 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still using the discharge curve it built around the old, degraded cell. The new cell has a steeper voltage drop under modem and screen load than the IC expects, so it misreads remaining capacity. When the phone pulls current for a data burst or screen wake, voltage dips below the hardware cutoff threshold — around 3.2V — before the gauge catches up. One full discharge-charge cycle at standard current forces the coulomb counter to rebuild its reference curve against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLU C5 won't power on after sitting in storage — BMS lockout recovery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells that drop below approximately 2.5V per cell trigger a protective BMS lockout to prevent damage. If the phone shows no response and won't charge via USB, the BMS has likely tripped. Connect the phone to a wall charger — not a PC port — and leave it for 15–20 minutes without pressing any buttons. The charge IC delivers a trickle current that nudges cell voltage above the BMS re-enable threshold, typically 2.9V, at which point normal charging resumes and the phone will power on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391829835866,"sku":"BWCS-BLC500SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391829868634,"sku":"BWCS-BLC500SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391829901402,"sku":"BWCS-BLC500SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLC500SL-1.webp?v=1779142264","url":"https:\/\/batteryweb.com\/products\/blu-c5-replacement-battery-37v-2500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}