{"product_id":"emachines-d442-replacement-battery-111v-8800mah-li-ion","title":"eMachines D442 Laptop Replacement Battery 11.1V 8800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eeMachines D442 \/ E442 Series — 11.1V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 8800mAh Li-ion replacement battery for the eMachines D442, D528, E440, and E442 laptop series. It slots into the original battery bay and connects via the standard multi-pin connector used across this platform. Capacity is 97.68Wh — higher than the stock cell shipped with most D-series units.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD442 \/ D528 \/ E440 \/ E442 platform fit:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell voltage rail, identical bay dimensions, and the same BMS handshake protocol — so one cell works across the full group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a D442 chassis. The BMS accepted the pack without error, balanced across all three cell groups, and held the charge curve through to cutoff without a protection trip.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle reset on eMachines BIOS:\u003c\/strong\u003e\n    After installing, run one complete discharge to hibernate cutoff, then charge uninterrupted to 100%. This triggers the BIOS battery learn cycle and clears the inaccurate health or capacity 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 D442 BIOS reports poor battery health after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe eMachines D442 BIOS reads health data from EEPROM values stored by the previous cell. When a new pack is installed, the BIOS compares incoming data against that stored profile and flags a mismatch as poor health. This is a data conflict, not a fault with the new battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to overwrite the old EEPROM values with the new cell's actual profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% shown on the fuel 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 inherited the old cell's voltage-to-capacity map, so it misreads the remaining charge and triggers shutdown early. The fix is two to three full calibration cycles — discharge fully to hibernate cutoff, then charge uninterrupted to 100% each time. After the third cycle, the gauge IC recalibrates and the reported percentage will align with actual remaining capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409800233050,"sku":"BWCS-AC4551DB-1","price":128.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409800265818,"sku":"BWCS-AC4551DB-2","price":147.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409800298586,"sku":"BWCS-AC4551DB-3","price":161.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC4551DB-1.webp?v=1779580971","url":"https:\/\/batteryweb.com\/products\/emachines-d442-replacement-battery-111v-8800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}