{"product_id":"gateway-nv78-replacement-battery-148v-4400mah-li-ion","title":"Gateway NV78 Notebook Replacement Battery 14.8V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGateway NV78 — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the Gateway NV78 notebook. It slots into the NV78's battery bay and restores portable operation when the original cell has degraded beyond use. Voltage and connector match the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNV78 platform fit:\u003c\/strong\u003e\n    The NV78 uses a 14.8V four-cell series Li-ion pack. Voltage rail and connector pinout on this replacement match that layout. The BMS handshake on the NV78 reads pack voltage and cell count — both check out on installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and full discharge under CPU and display load. The BMS held voltage across the discharge curve and tripped cutoff cleanly at the low-voltage threshold without hard shutdown above it.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the NV78:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. The NV78 BIOS uses a battery learn cycle to calibrate its fuel gauge IC against the new cell. Skipping this step causes the health warning and inaccurate percentage readouts that appear after any 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 swapping cells on the NV78\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe NV78 BIOS carries EEPROM data written by the original battery during its service life. When a new cell is installed, that stored data no longer matches the new cell's chemistry profile, triggering a poor health or unknown battery warning. This is a firmware state issue, not a fault with the replacement cell. Run one complete discharge-to-hibernate then a full uninterrupted charge. After two to three cycles, the BIOS overwrites the stale EEPROM values and the health status clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNV78 shutting down abruptly at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below what the NV78's power circuit can sustain under combined CPU and display load. The fuel gauge shows 20–30% remaining, but the cell hits a voltage cliff under load before it can deliver those final milliamp-hours. The system cuts power rather than brown out the CPU. Confirm the cell rests at or above 14.4V under light load at the reported 20% mark — if it reads below that, run the full learn cycle again to let the fuel gauge IC recalibrate against the actual discharge curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410864668762,"sku":"BWCS-AC5520NB-1","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410864701530,"sku":"BWCS-AC5520NB-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410864734298,"sku":"BWCS-AC5520NB-3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC5520NB-1.webp?v=1779581401","url":"https:\/\/batteryweb.com\/products\/gateway-nv78-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}