{"product_id":"blu-win-jr-replacement-battery-38v-1950mah-li-ion","title":"BLU Win JR C585105195L Replacement Battery 3.8V 1950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU Win JR \/ W410 — 3.8V Li-ion Replacement Battery (C585105195L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 1950mAh Li-ion cell for the BLU Win JR and W410 smartphones. It replaces part number C585105195L and fits both model designations sharing that OEM part. Capacity figure is taken directly from product data at 7.41Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWin JR and W410 compatibility:\u003c\/strong\u003e\n    Both models run on the same 3.8V single-cell architecture with an identical connector pinout and BMS handshake protocol, so 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 charge and discharge on the Win JR platform. The BMS accepted the new cell, balancing terminated cleanly, and protection circuits tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one complete discharge down to automatic shutoff, then charge uninterrupted to 100%. This gives the fuel gauge IC a full reference curve against the new cell before high-current charging begins on an uncalibrated counter.\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 Win JR after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a different internal impedance profile than the degraded cell the fuel gauge IC was calibrated to. Under load spikes — modem connecting to a cell tower, screen at full brightness — the terminal voltage drops sharply below the cutoff threshold even though the displayed percentage reads 20–30%. The phone interprets that voltage sag as a dead cell and shuts down. One full discharge-charge cycle resets the coulomb counter and maps the new cell's actual voltage curve, eliminating false shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery on first few charges after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh cell starts with higher internal impedance than a broken-in one. The charge IC pushes current into that resistance, and the extra energy dissipates as heat around the battery compartment. This is normal during the first two to three cycles as the cell's impedance settles. If the warmth continues past the third full charge or the phone becomes hot to the touch, check that the charge voltage hasn't exceeded 4.35V — measure at the charging port with a USB meter.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404143886426,"sku":"BWCS-BLW410SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404143919194,"sku":"BWCS-BLW410SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404143951962,"sku":"BWCS-BLW410SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLW410SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/blu-win-jr-replacement-battery-38v-1950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}