{"product_id":"acer-nitro-5-an515-43-r41a-replacement-battery-154v-3700mah-li-polymer","title":"Acer Nitro 5 AN515-43-R41A Compatible Battery 15.4V 3700mAh AP18E8M","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Nitro 5 AN515-43 Series — 15.4V Li-Polymer Replacement Battery (AP18E8M)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15.4V, 3700mAh (56.98Wh) Li-Polymer battery for the Acer Nitro 5 and Aspire 5 laptop lines. It replaces OEM part numbers AP18E8M, AP18E7M, KT.00407.007, and KT00407009. It fits the AN515-43, AN515-54, and AN517-51 series, among 340 additional Acer models sharing the same battery bay and connector spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAN515 and AN517 series fit:\u003c\/strong\u003e\n    These Nitro models share a common 15.4V four-cell battery rail, the same ZH1.25 connector pinout, and an identical BMS handshake protocol — which is why one SKU 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 cycled this cell on an AN515-54 chassis. The BMS accepted the new cell on first boot, reported charge current correctly through the EC, and held voltage above 14.8V through a sustained CPU-plus-GPU load draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Nitro 5:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This single cycle resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nitro 5 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nitro 5 EC uses stored discharge curves from the old cell to predict cutoff voltage. With a new cell installed, those curves no longer match actual cell chemistry, so the EC triggers a shutdown well before the cell is depleted. The symptom looks like a faulty battery but is entirely a calibration issue. Running two full discharge-to-hibernate cycles forces the EC to rebuild its fuel map against the new cell. After that, the gauge and cutoff threshold track correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS showing battery health as \"poor\" immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Acer BIOS reads health data from EEPROM registers inside the battery's BMS — not from live voltage measurements. When a replacement cell ships, those registers reflect factory defaults, not a full charge history, and the BIOS flags this as degraded. This is not a fault with the cell. Complete one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. The BIOS battery health indicator will update after the learn cycle completes and the register values normalise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409645895770,"sku":"BWCS-ACS314NB-1","price":57.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409645928538,"sku":"BWCS-ACS314NB-2","price":67.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409645961306,"sku":"BWCS-ACS314NB-3","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACS314NB-1.webp?v=1779580213","url":"https:\/\/batteryweb.com\/products\/acer-nitro-5-an515-43-r41a-replacement-battery-154v-3700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}