{"product_id":"htc-s620-replacement-battery-37v-2200mah-li-ion","title":"HTC S620 EXCA160 Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHTC S620 — 3.7V Li-ion Replacement Battery (EXCA160)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh Li-ion replacement battery for the HTC S620 smartphone. It fits the S620 directly, matching the original cell footprint at 55.82 × 35.90 × 10.11mm. OEM part numbers EXCA160 and 35H00080-00M both cross-reference to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHTC S620 fitment:\u003c\/strong\u003e\n    The S620 uses a single-cell 3.7V Li-ion pack with a specific connector pinout and BMS communication line. This cell matches that pinout, so the phone's charge controller and fuel gauge IC handshake 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 S620 platform. The BMS accepted the charge curve without tripping cutoff, and the fuel gauge IC tracked state-of-charge through the full discharge sweep.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use after fitting this cell, disable any fast-charge accessory and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its calibration against the new cell's discharge curve before high-current charging pushes load 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 S620 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe S620's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The phone reads voltage from the cell and maps it against the old curve, so the percentage displayed is off — sometimes significantly. One full discharge cycle followed by a full charge resets the coulomb counter and lets the IC relearn the new curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — modem transmit bursts or screen-on draw pull current the cell cannot sustain at that state-of-charge. The BMS reads the voltage cliff as a low-cell condition and cuts output before the gauge hits zero. It is not a faulty cell — it is the fuel gauge IC reading a miscalibrated curve. Run two full discharge-charge cycles at standard charge current, and the shutdowns typically stop once the IC has recalculated the voltage cliff point for the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405255409754,"sku":"BWCS-DC700XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405255442522,"sku":"BWCS-DC700XL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405255475290,"sku":"BWCS-DC700XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DC700XL-1.webp?v=1779370350","url":"https:\/\/batteryweb.com\/products\/htc-s620-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}