{"product_id":"acer-swift-3-sf315-52g-54da-replacement-battery-152v-3150mah-li-ion","title":"Acer Swift 3 SF315-52G-54DA Replacement Battery AC17B8K 15.2V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Swift 3 SF315-52G Series — 15.2V Li-ion Replacement Battery (AC17B8K)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.2V, 3150mAh (47.88Wh) Li-ion battery for the Acer Swift 3 SF315-52G-54DA, SF315-52G-89HT, SF315-52-58FQ, SF315-52G-550X, and over 175 other Swift 3 SF315-52 variants. It slots into the same bay and uses the same four-cell configuration as the original AC17B8K pack. It also cross-references as KT.0040G.012.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSF315-52 and SF315-52G shared platform:\u003c\/strong\u003e\n    Both the non-G and G-suffix models share the same 15.2V four-cell rail, identical connector pinout, and the same BMS handshake protocol — so one part number covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an SF315-52G chassis and confirmed the BMS completed the charge handshake correctly, hit full charge termination at 16.8V, and reported accurate state-of-charge data to the ACPI layer throughout the cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation calibration on the Swift 3:\u003c\/strong\u003e\n    After fitting, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false health warnings that appear in Acer Care Center after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting the AC17B8K\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Swift 3 BIOS reads health data from the EEPROM embedded in the original pack. When a new cell is installed, that EEPROM data is gone — the BIOS flags the pack as degraded because it has no charge history to reference. This is not a fault with the replacement cell. Running a full discharge-to-hibernate followed by a full uninterrupted charge forces the fuel gauge IC to write a new baseline. After one or two full cycles, the BIOS health indicator returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSwift 3 shutting down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The percentage shown is based on old data, so the reported 25% may represent a real voltage that the cell can no longer sustain under the combined load of the CPU and display backlight. The cell hits its low-voltage cutoff — typically around 12.0V under load — before the OS gets a shutdown warning. The fix is to complete two full calibration cycles: discharge to hibernate, charge to 100%, repeat once more.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409623253082,"sku":"BWCS-ACW315NB-1","price":94.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409623285850,"sku":"BWCS-ACW315NB-2","price":108.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409623318618,"sku":"BWCS-ACW315NB-3","price":119.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACW315NB-1.webp?v=1779580213","url":"https:\/\/batteryweb.com\/products\/acer-swift-3-sf315-52g-54da-replacement-battery-152v-3150mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}