{"product_id":"blu-ez2go-replacement-battery-37v-1000mah-li-ion","title":"BLU EZ2Go Replacement Battery N4U85T 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBLU EZ2Go — 3.7V Li-ion Replacement Battery (N4U85T)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V lithium-ion cell replaces the N4U85T battery in the BLU EZ2Go smartphone. Capacity is 1000mAh (3.7Wh), matching the original specification. It fits the EZ2Go's battery bay and connects to the same board-side connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEZ2Go platform fit:\u003c\/strong\u003e\n    The EZ2Go uses a single removable cell on a 3.7V rail with a straightforward connector and BMS handshake. This cell matches that rail voltage and connector pinout exactly — no adapter needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through the BMS. The protection circuit triggered correctly at low-voltage cutoff, and the charge IC accepted the cell without fault codes on the board.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EZ2Go reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EZ2Go's fuel gauge IC builds its percentage model from the old cell's coulomb-counting history. When a new cell goes in, that stored curve no longer matches actual cell behaviour. The IC will report percentages that drift from reality — often reading higher or lower than the true state of charge. One full discharge to automatic shutoff, followed by an uninterrupted charge to 100%, forces the IC to rewrite its reference curve against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the EZ2Go after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't yet recalibrated and the cell voltage drops sharply under modem or screen load — a voltage cliff the old curve didn't predict. The phone's protection circuit reads a legitimate undervoltage condition and cuts power before the displayed percentage reaches zero. It is not a faulty cell. Complete one full discharge-charge cycle without interruption, and the shutdowns will stop once the gauge IC maps the real discharge curve. If the issue persists after two full cycles, check that the battery connector is fully seated — an intermittent contact causes identical symptoms at the same voltage range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409490116698,"sku":"BWCS-NK4USL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409490149466,"sku":"BWCS-NK4USL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409490182234,"sku":"BWCS-NK4USL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK4USL-1.webp?v=1779579814","url":"https:\/\/batteryweb.com\/products\/blu-ez2go-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}