{"product_id":"gateway-nv4900-replacement-battery-111v-6600mah-li-ion","title":"Gateway NV4900 Replacement Battery 11.1V 6600mAh 31CR19\/652","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGateway NV4900 Series — 11.1V Li-ion Replacement Battery (31CR19\/652)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V, 6600mAh Li-ion battery replaces the original cell in Gateway NV4900, NV49C, NV49C13C, NV59C, and over 79 additional NV-series notebook models. It slots into the same battery bay and connects to the same BMS handshake circuit as the factory unit. Capacity is 73.26Wh — matched to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNV-series platform fit:\u003c\/strong\u003e\n    These models share a common 11.1V three-cell battery rail and use the same OEM connector pinout and BMS communication protocol. Part numbers AS10D31, AS10D3E, AS10D41, AS10D51, AS10D61, AS10D71, BT.00603.111, BT.00606.008, BT.00607.125, and BT.00607.127 all cross to this cell.\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 an NV-series unit. The BMS handshook correctly on first connection, charge termination triggered at full capacity, and the protection circuit responded normally to load spikes during CPU-intensive tasks.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration cycle:\u003c\/strong\u003e\n    After installing this battery, run the laptop off battery until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to recalculate against the new cell 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\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Gateway NV-series BIOS reads health data from EEPROM stored on the battery's fuel gauge IC — not from live cell voltage. When you install a replacement cell, that EEPROM still holds charge history from the previous battery. The BIOS interprets this stale data as a degraded cell and flags poor health even though the new cell is full capacity. Running one complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle. After two to three cycles, the health indicator updates to reflect the actual cell state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly while the gauge still shows 20–30% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff, not a software glitch. Under combined CPU and display load, current draw spikes and cell voltage drops faster than the fuel gauge IC can recalibrate. When voltage falls below the BMS cutoff threshold — typically around 9.0V for an 11.1V three-cell pack — the laptop cuts power instantly, even though the displayed percentage hasn't caught up. The fuel gauge IC needs several full discharge-recharge cycles against the new cell to map the actual voltage curve accurately. Run the laptop unplugged through two complete discharge cycles to bring the gauge into calibration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409810849882,"sku":"BWCS-AC4551HB-1","price":124.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409810882650,"sku":"BWCS-AC4551HB-2","price":143.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409810915418,"sku":"BWCS-AC4551HB-3","price":157.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC4551HB-1.webp?v=1779581043","url":"https:\/\/batteryweb.com\/products\/gateway-nv4900-replacement-battery-111v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}