{"product_id":"acer-swift-5-sf514-54gt-595g-replacement-battery-154v-3800mah-li-polymer","title":"Acer Swift 5 SF514-54GT-595G Compatible Battery AP18C7M 15.4V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Swift 5 SF514-54GT-595G — 15.4V Li-Polymer Replacement Battery (AP18C7M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 3800mAh (58.52Wh) Li-Polymer battery for the Acer Swift 5 SF514-54GT-595G ultrabook and compatible models including the TravelMate Spin P4 TMP414RN-51-72QA and Swift 3 SF316-51-77LN. It replaces OEM part numbers AP18C7M and KT00407008. Dimensions are 261.00 x 88.20 x 6.00mm — confirm fitment against your original cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSwift 5 \/ Swift 3 \/ TravelMate Spin P4 compatibility:\u003c\/strong\u003e\n    These models share the same 15.4V four-cell Li-Polymer architecture, identical connector pinout, and BMS handshake protocol — which is why a single cell covers all of them despite different chassis sizes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Swift 5 SF514-54GT unit. The BMS accepted the cell without error flags, and the charge controller reached full termination voltage without tripping.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle discharge reset on Swift 5:\u003c\/strong\u003e\n    After installing, let the battery discharge fully to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears 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\"\u003eWhy the Swift 5 BIOS flags a new battery as poor health immediately after swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Swift 5 firmware reads EEPROM data written by the original factory cell during initial calibration. When a replacement cell is installed, that EEPROM record does not match the new cell's charge history, so the BIOS health register shows \"poor\" or a low percentage. This is a firmware state issue, not a fault with the replacement cell. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to rewrite the learn cycle data against the new cell. After one or two full cycles, the health reading normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSwift 5 shutting down at 20–30% remaining shown on the gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't calibrated against the new cell's voltage curve. The gauge reads 25% but the cell voltage has already dropped below the BMS cutoff threshold under combined CPU and display load — so the system shuts down abruptly. It's not a faulty battery; it's a misaligned voltage-to-percentage map. Run two complete discharge-to-hibernate and full-charge cycles without interruption. After the second cycle, the fuel gauge IC relearns the curve and the shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409570201690,"sku":"BWCS-ACW514NB-1","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409570234458,"sku":"BWCS-ACW514NB-2","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409570267226,"sku":"BWCS-ACW514NB-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACW514NB-1.webp?v=1779580060","url":"https:\/\/batteryweb.com\/products\/acer-swift-5-sf514-54gt-595g-replacement-battery-154v-3800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}