{"product_id":"twinhead-10d-replacement-battery-111v-4400mah-li-ion","title":"Twinhead 10D Replacement Battery 11.1V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTwinhead 10D — 11.1V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 4400mAh (48.84Wh) lithium-ion battery for the Twinhead 10D notebook. It replaces the original cell when the existing pack no longer holds a usable charge. No OEM part number is listed for this model, so match by fit model — 10D — before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTwinhead 10D platform fit:\u003c\/strong\u003e\n    The 10D uses an 11.1V three-cell Li-ion architecture. This replacement matches that voltage rail and connector pinout. A mismatch on either will prevent the BIOS from recognising the pack or trigger an immediate charge rejection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a load tester. The BMS responded correctly to taper current at full charge and held the low-voltage cutoff at the expected threshold without tripping early.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the 10D:\u003c\/strong\u003e\n    After fitting, run the notebook off battery only until it hibernates from low charge, 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.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 10D BIOS reports poor battery health immediately after a swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Twinhead 10D stores learned capacity data in EEPROM on the battery controller. When a new cell is installed, that stored data does not match the fresh chemistry, so the BIOS flags the pack as degraded or unknown. This is a data mismatch, not a fault with the replacement cell. Running a full discharge-to-hibernate followed by an uninterrupted charge gives the BIOS enough data to rewrite the EEPROM estimate. After one or two full cycles the health status corrects itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTwinhead 10D 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. The percentage on screen is based on stale capacity data, and the actual cell voltage hits its cutoff well before the gauge reaches zero. The fix is the same calibration cycle — discharge fully to hibernate, recharge to 100% without interruption, and repeat once more. After two full cycles the fuel gauge IC re-anchors its readings to the actual cell and the early shutdowns stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410818629722,"sku":"BWCS-AT1020NB-1","price":67.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410818662490,"sku":"BWCS-AT1020NB-2","price":79.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410818695258,"sku":"BWCS-AT1020NB-3","price":87.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AT1020NB-big.webp?v=1779581181","url":"https:\/\/batteryweb.com\/products\/twinhead-10d-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}