{"product_id":"acer-aspire-one-replacement-battery-111v-2200mah-li-ion","title":"Acer Aspire One UM08A73 Replacement Battery 11.1V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Aspire One — 11.1V Li-ion Replacement Battery (UM08A73)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V 2200mAh Li-ion battery replaces the original cell in the Acer Aspire One netbook series. It covers the A110-1295, A110-1545, A110-1691, and over 150 additional Aspire One variants. OEM part numbers UM08A73, UM08A72, UM08A74, UM08B73, and UM08B74 all cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAspire One series coverage:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell Li-ion architecture, identical connector pinout, and the same BMS handshake protocol — which is why a single replacement cell spans the full A110 and A150 lineups without modification.\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 an Aspire One A150. The BMS communicated correctly with the BIOS from the first cycle — no unknown device flag, no charge refusal at initialization.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration on the Aspire One:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. The Aspire One BIOS uses this cycle to recalibrate its battery learn table — skipping it causes the health indicator to show a false warning for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAspire One shutting down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure, not a capacity failure. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track — the BIOS triggers a hard shutdown before the displayed percentage reaches zero. It typically happens in the first two cycles with a fresh cell because the gauge IC has not yet mapped the new cell's discharge curve. Running two full discharge-to-hibernate cycles corrects the mapping. After calibration, the shutdown threshold should align with 5% or lower on the gauge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Aspire One BIOS stores battery health data in EEPROM and compares it against the previous cell's logged wear state. When a new cell goes in, the EEPROM data no longer matches the fresh chemistry — the BIOS flags this as degraded rather than new. This is not a fault with the replacement cell. Run the battery learn cycle: discharge fully to auto-hibernate, then charge uninterrupted to 100% twice. The BIOS rewrites its health baseline after the second completed cycle and clears the warning.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410863784026,"sku":"BWCS-ACZG5NK-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410863816794,"sku":"BWCS-ACZG5NK-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410863849562,"sku":"BWCS-ACZG5NK-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACZG5NK-1.webp?v=1779581401","url":"https:\/\/batteryweb.com\/products\/acer-aspire-one-replacement-battery-111v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}