{"product_id":"sager-np9772-replacement-battery-148v-4400mah-li-ion","title":"Sager NP9772 Replacement Battery 14.8V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSager NP9772 \/ NP9752 Series — 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 Sager NP9772, NP9772-S, NP9773, NP9752, and related gaming laptop models. It replaces a dead or degraded original cell that can no longer sustain load during unplugged use. Fit is confirmed across the listed NP9700-series chassis variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNP9700-series chassis compatibility:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, connector pinout, and BMS communication protocol, which is why one cell covers the full group. Swapping between NP9752, NP9772, and NP9773 units does not require firmware changes or adapter hardware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the NP9772 platform. The BMS handshake completed without fault codes, charge acceptance reached rated capacity, and thermal readings stayed within spec under combined CPU and GPU load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Sager gaming laptops:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle and clears the false \"poor 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 NP9772 shuts down at 20–30% shown on the gauge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eUnder full gaming load — CPU boost plus discrete GPU plus backlit display — the NP9772 draws current spikes the degraded cell cannot sustain. Voltage drops sharply below what the BMS considers safe, and the system cuts power even though the OS fuel gauge still shows charge remaining. This is a voltage cliff, not a capacity measurement failure. A fresh cell with healthy internal resistance handles those spikes without the same voltage sag, so the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting the replacement cell as 0% or unknown after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EEPROM data burned into the old cell's controller chip doesn't transfer to the new battery. Until the BIOS runs a full learn cycle, it has no reference point for state-of-charge and reports 0% or \"unknown.\" This is not a fault with the replacement cell. Discharge completely to hibernate cutoff, then charge to 100% without interruption — after that cycle, the BIOS will read the battery correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409750163546,"sku":"BWCS-CLP750NB-1","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409750196314,"sku":"BWCS-CLP750NB-2","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409750229082,"sku":"BWCS-CLP750NB-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLP750NB-1.webp?v=1779580646","url":"https:\/\/batteryweb.com\/products\/sager-np9772-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}