{"product_id":"gateway-nv52-replacement-battery-111v-4400mah-li-ion","title":"Gateway NV52 Replacement Battery 11.1V 4400mAh AS09A31","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGateway NV52 Series — 11.1V Li-ion Replacement Battery (AS09A31)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh Li-ion battery that fits the Gateway NV52 and related NV-series laptops. It replaces OEM part numbers AS09A31, AS09A41, AS09A56, AS09A61, AS09A71, AS09A73, AS09A75, and AS09A90. If your original battery no longer holds a charge or drops dead without warning, this cell slots directly into the same bay with the same connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNV52 series compatibility:\u003c\/strong\u003e\n    Models NV52, NV5207U, NV5211U, NV5212U, and 59 additional NV-series variants all share the same 11.1V three-cell rail, identical BMS handshake protocol, and the same physical connector — that's why one part number covers the entire platform.\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 a Gateway NV52 board. The BMS accepted the cell without error, the charge circuit ramped normally to 12.6V, and no fault codes triggered during the discharge phase.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the NV52:\u003c\/strong\u003e\n    After fitting the new cell, run one full discharge until the laptop hibernates, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle on the NV52 and clears the inaccurate health warning that appears 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 NV52 BIOS reports poor battery health after a new cell install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Gateway NV52 stores battery health data in EEPROM on the battery's internal circuit board. When you swap to a new cell, the BIOS compares live readings against stale data written by the old battery. The mismatch flags the new cell as degraded even though the cell itself is fresh. Running one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100% forces the BIOS to overwrite the old EEPROM values with accurate readings from the new chemistry.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNV52 shutting down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff — when the CPU and display draw full load simultaneously, a degraded or uncalibrated cell cannot sustain the voltage the BMS expects at that state of charge, and the system cuts power to protect itself. The OS fuel gauge IC hasn't yet mapped the new cell's discharge curve, so it reports 25% when the cell is already near its low-voltage cutoff. Run two full calibration cycles — discharge to hibernate, charge to 100% each time — and the fuel gauge IC will remap against the new cell's actual curve. After two cycles, the reported percentage and actual cutoff point should align within a few percent.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409826250842,"sku":"BWCS-AC5532NB-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409826283610,"sku":"BWCS-AC5532NB-2","price":111.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409826316378,"sku":"BWCS-AC5532NB-3","price":121.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC5532NB-1.webp?v=1779581091","url":"https:\/\/batteryweb.com\/products\/gateway-nv52-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}