{"product_id":"hp-pavilion-m1-replacement-battery-77v-4300mah-li-ion","title":"NU02XL HP Pavilion M1 Replacement Battery 7.7V 4300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Pavilion M1-U Series — 7.7V Li-ion Replacement Battery (NU02XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 4300mAh (33.11Wh) Li-ion battery for the HP Pavilion M1, M1-U, and M1-U001DX notebooks. It slots into the same bay as the original NU02XL and restores battery-powered operation to units with degraded or failed cells. OEM cross-references include HSTNN-UB6U, TPN-W117, 843535-541, and 844200-850.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePavilion M1-U platform fit:\u003c\/strong\u003e\n    The M1-U line shares a single battery bay spec — 7.7V nominal rail, same connector pinout, and the same BMS handshake protocol across the M1, M1-U, and M1-U001DX variants. One cell fits the full range 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 an M1-U001DX unit and logged the BMS charge cycle from 0% to full. Charge current tapered correctly at the CV stage, and the protection circuit tripped cleanly at the low-voltage floor — no abnormal cutoffs or communication errors during the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the M1-U:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. The Pavilion M1 BIOS uses a battery learn cycle to map cell capacity — skipping this step leaves the fuel gauge IC working off old data, which causes 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 the NU02XL\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP Pavilion M1 BIOS reads battery health from EEPROM data written by the previous cell. When a new cell goes in, that stored data doesn't match the new cell's charge curve — so the BIOS flags it as degraded before it has run a single cycle. This is not a fault with the replacement cell. Run one full discharge-to-hibernate, then a complete uninterrupted charge, to let the BIOS overwrite the stale EEPROM health data. After two to three cycles the health status in HP Support Assistant should update to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePavilion M1 shutting down at 20–30% charge shown on screen\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 referencing voltage thresholds from the worn-out original cell, so it calls shutdown too early. Under combined CPU and display load, the voltage drop looks steeper than the IC expects, and it triggers a protective shutdown before the cell is actually empty. Run two full discharge-to-hibernate cycles and charge back to 100% each time — by the second full cycle the fuel gauge IC recalibrates and the reported percentage aligns with actual remaining charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409731911770,"sku":"BWCS-HPU100NB-1","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409731944538,"sku":"BWCS-HPU100NB-2","price":68.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409731977306,"sku":"BWCS-HPU100NB-3","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPU100NB-1.webp?v=1779580558","url":"https:\/\/batteryweb.com\/products\/hp-pavilion-m1-replacement-battery-77v-4300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}