{"product_id":"aligator-d100-replacement-battery-37v-900mah-li-ion","title":"Aligator D100 Replacement Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAligator D100 — 3.7V Li-ion 900mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion replacement battery for the Aligator D100 smartphone. It replaces a failed or degraded original cell and restores the phone to normal operation for calls, messaging, and basic functions. Capacity is 900mAh (3.33Wh), matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAligator D100 fitment:\u003c\/strong\u003e\n    The D100 uses a compact 46.20 x 34.14 x 5.68mm cell format with a low-current 3.7V rail. The connector pinout and BMS handshake are specific to this housing — do not substitute a higher-capacity cell from a different model even if the footprint looks close.\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 while monitoring BMS cutoff thresholds. The protection circuit tripped correctly at the low-voltage floor and accepted charge without error flags on the fuel gauge IC.\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 full discharge-to-charge cycle before relying on the percentage readout. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before any high-current charging session.\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 Aligator D100 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff — it cannot sustain rail voltage under combined modem and screen load — before the reported percentage reaches zero. The phone interprets the voltage drop as a hard fault and cuts off. One complete discharge cycle from 100% to automatic shutdown, followed by a full charge, resets the coulomb counter to the new cell's actual capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell voltage drops below approximately 2.5V per cell, the BMS enters lockout mode to prevent charging a critically depleted cell at full current. The phone shows nothing — no charge indicator, no boot screen. Connect to a wall charger rated at least 5V\/1A and leave it for 20–30 minutes without pressing the power button; the charge IC uses a trickle pre-charge path to recover the cell to a safe voltage before the BMS releases and normal charging begins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405108707418,"sku":"BWCS-NK5BHL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405108740186,"sku":"BWCS-NK5BHL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405108772954,"sku":"BWCS-NK5BHL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK5BHL-1.webp?v=1779369992","url":"https:\/\/batteryweb.com\/products\/aligator-d100-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}