{"product_id":"asus-g751j-replacement-battery-15v-5200mah-li-ion","title":"Asus A42N1403 ROG G751J Replacement Battery 15V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAsus ROG G751J Series — 15V Li-ion Replacement Battery (A42N1403)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 15V Li-ion battery rated at 5200mAh (78Wh), replacing part number A42N1403 in Asus ROG G751J series gaming laptops. It fits the G751J, G751JM, ROG GFX71JY, G751J-BHI7T25, and over 30 additional variants. Install it when the original cell no longer sustains a charge under gaming or CPU-heavy load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG751J platform compatibility:\u003c\/strong\u003e\n    The G751 series shares a four-cell 15V architecture across its variants. The A42N1403 connector, BMS handshake, and voltage rail are consistent across G751J, G751JM, and GFX71JY boards — one cell fits all listed models without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a G751JM and confirmed the BMS completed a full charge cycle without tripping overcurrent cutoff. Charge acceptance was stable from 0V recovery through to 16.8V termination voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the G751J:\u003c\/strong\u003e\n    After fitting, discharge the laptop fully to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell 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 G751J BIOS reports poor battery health immediately after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe G751J stores charge history and wear data in EEPROM on the battery pack itself. When a new cell is installed, the BIOS reads that EEPROM data as blank or mismatched and flags the battery as degraded. This is a data mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate then a clean uninterrupted charge to 100% rewrites the learn cycle data and resolves the warning. After two or three full cycles, BIOS-reported health should stabilise at normal levels.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the Windows gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The IC is still using the old cell's voltage-to-capacity mapping, so it misreads the cutoff point. Under full GPU and CPU load, the cell hits its minimum sustain voltage before the gauge reaches 0%. Run two full discharge cycles — discharge to hibernate-cutoff, then charge fully to 100% each time — and the fuel gauge IC will recalibrate its endpoint to the correct voltage floor of approximately 12V for this 15V cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409761370202,"sku":"BWCS-AUG751NB-1","price":112.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409761402970,"sku":"BWCS-AUG751NB-2","price":128.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409761435738,"sku":"BWCS-AUG751NB-3","price":140.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUG751NB-1.webp?v=1779580715","url":"https:\/\/batteryweb.com\/products\/asus-g751j-replacement-battery-15v-5200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}