{"product_id":"hyundai-a100-replacement-battery-37v-1500mah-li-ion","title":"Hyundai A100 Replacement Battery BTR-4100 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHyundai A100 — 3.7V Li-ion Replacement Battery (BTR-4100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion replacement battery for the Hyundai A100 smartphone. It replaces OEM part BTR-4100 and restores power to calling, messaging, and onboard applications. Fit the new cell when the original no longer holds a charge or the phone shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHyundai A100 fitment:\u003c\/strong\u003e\n    The A100 uses a removable cell format with a three-pin connector that carries both power and BMS communication. The BTR-4100 cell matches that connector layout and voltage rail, so the phone's charge IC reads the new cell correctly without throwing a fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a full charge-discharge run and confirmed the BMS handshake completed on first connection, charge current stepped down correctly at 4.2V, and the protection circuit tripped as expected at the low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging if your A100 supports it and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts reporting percentage readings — skipping this step causes erratic percentage jumps in the first few days of use.\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 Hyundai A100\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is the most reported failure pattern on worn A100 cells and can persist briefly on a new cell until the fuel gauge recalibrates. The cell's actual voltage drops below the modem and screen's minimum supply threshold under load, even though the OS still reports 20–30% remaining. The fuel gauge IC is reading a state-of-charge curve that no longer matches the cell's real discharge profile. Run one full discharge to auto-off, then charge uninterrupted to 100%, and the shutdowns should stop after that first calibration cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eA100 not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage, and if the BTR-4100 cell dropped below approximately 2.5V per cell while sitting in a warehouse, the BMS will have entered lockout mode to prevent further discharge damage. The phone will show no sign of life even on a charger at first. Connect to a charger and leave it for 20–30 minutes without pressing the power button — the charge IC needs time to trickle current into the cell and lift it above the BMS re-enable threshold, typically around 2.9V, before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405151862874,"sku":"BWCS-SP230SL-1","price":27.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405151895642,"sku":"BWCS-SP230SL-2","price":30.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405151928410,"sku":"BWCS-SP230SL-3","price":33.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SP230SL-big.webp?v=1779370298","url":"https:\/\/batteryweb.com\/products\/hyundai-a100-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}