{"product_id":"hp-mini-311-replacement-battery-108v-4400mah-li-ion","title":"HP Mini 311 HSTNN-UB0N Replacement Battery 10.8V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Mini 311 Series — 10.8V Li-ion Replacement Battery (HSTNN-UB0N)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 4400mAh (47.52Wh) Li-ion battery for the HP Mini 311 netbook. It replaces OEM part numbers HSTNN-UB0N, HSTNN-OB0N, HSTNN-IBON, 572831-541, 580029-001, and several others in this family. It fits the Mini 311, Mini 311-1007TU, Mini 311-1008TU, Mini 311-1012TU, and over 50 additional Mini 311 variants.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMini 311 platform compatibility:\u003c\/strong\u003e\n    Every model in this list shares the same 10.8V three-cell voltage rail, the same physical connector pinout, and the same BMS handshake protocol — which is why a single part number covers more than 50 sub-models without 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 Mini 311 chassis and confirmed the BMS completed the charge cycle without tripping an over-voltage cutoff, and the fuel gauge IC registered the full 4400mAh capacity across discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Mini 311:\u003c\/strong\u003e\n    After installation, run the laptop on battery until it hibernates on low-power cutoff, then charge uninterrupted to 100%. This single learn cycle resets the BIOS battery health counter 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 Mini 311 BIOS reports poor battery health immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP Mini 311 BIOS reads health data from an EEPROM log built up by the original cell over its lifetime. When a fresh cell is installed, the BIOS compares it against that old log and flags a mismatch as poor health — even though the new cell is fine. The fuel gauge IC on this platform also needs several discharge-charge cycles before its internal model of the new cell stabilises. Until that calibration happens, health percentage readings can appear deflated or jump erratically. Run two full discharge-to-hibernate and uninterrupted-charge cycles to clear this.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMini 311 shutting down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage collapses faster than the fuel gauge IC predicts under combined CPU and display load. The gauge was calibrated to a degraded old cell, so its discharge curve model no longer matches the new chemistry. The BMS triggers a hard cutoff to protect the cell before the screen percentage reaches zero. Fix this by completing one full discharge to hibernate-cutoff followed by an uninterrupted charge to 100%, then repeat once — after two cycles the fuel gauge recalibrates to the new cell's actual voltage curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410818334810,"sku":"BWCS-HPM311NB-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410818367578,"sku":"BWCS-HPM311NB-2","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410818400346,"sku":"BWCS-HPM311NB-3","price":130.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPM311NB-1.webp?v=1779581212","url":"https:\/\/batteryweb.com\/products\/hp-mini-311-replacement-battery-108v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}