{"product_id":"utec-v171-replacement-battery-37v-750mah-li-ion","title":"UTEC V171 Compatible Battery 3.7V 750mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUTEC V171 \/ V181 \/ V201 \/ V566 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 750mAh Li-ion cell for the UTEC V171, V181, V201, and V566 smartphones. It matches the original cell's dimensions (53.00 × 33.90 × 5.70mm), voltage, and connector footprint. Install it when the original cell no longer holds a charge or the phone shuts down before the screen says it should.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV171 \/ V181 \/ V201 \/ V566 compatibility:\u003c\/strong\u003e\n    These four UTEC models share the same battery bay dimensions, 3.7V rail, and connector pinout. One cell fits all four 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 the bench. The BMS engaged correctly at both the high-voltage cutoff and the low-voltage floor, with no thermal events during the charge phase.\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 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 percentages it can trust.\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 a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different discharge curve than the aged cell the phone's fuel gauge IC was calibrated against. At moderate charge levels, the IC may read 25% while the actual cell voltage has already dropped below what the modem or screen load needs to stay stable. The phone cuts out to protect the hardware — it is not a faulty battery. One full discharge-charge cycle at standard rate recalibrates the coulomb counter and closes the gap between reported and actual state of charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell voltage has dropped below approximately 2.5V, the BMS enters lockout mode and blocks any charge current as a protection measure. Connect the phone to a wall charger — not a PC USB port — and leave it for 15 to 20 minutes without pressing the power button. A wall charger delivers enough current to nudge the BMS out of lockout. Once the screen shows the charging indicator, the cell is above the recovery threshold and will charge normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409499127898,"sku":"BWCS-NK5CML-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409499160666,"sku":"BWCS-NK5CML-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409499193434,"sku":"BWCS-NK5CML-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK5CML-1.webp?v=1779579815","url":"https:\/\/batteryweb.com\/products\/utec-v171-replacement-battery-37v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}