{"product_id":"leo-designote-a360-replacement-battery-148v-4400mah-li-ion","title":"Leo DesigNote A360 14.8V Replacement Battery 21-91081-00","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLeo DesigNote A360 Series — 14.8V Li-ion Replacement Battery (21-91081-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.8V, 4400mAh (65.12Wh) lithium-ion battery replaces the original cell in the Leo DesigNote A360, DesigNote A360 Plus, and DesigNote M285 notebooks. It matches the original voltage rail and connector spec across the full OEM part range, including 21-91081-00 through 21-92130-30. Install it when the existing cell no longer holds usable charge under normal workloads.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA360, A360 Plus, and M285 compatibility:\u003c\/strong\u003e\n    All three models run the same 14.8V four-cell Li-ion configuration and share identical connector pinout and BMS handshake protocol — that is why a single part number series covers the entire range.\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 the DesigNote platform. The BMS negotiated correctly, charge current tapered as expected at capacity, and the protection circuit tripped at the correct low-voltage threshold without false cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the DesigNote A360:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the notebook hibernates at cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity 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\"\u003eDesigNote A360 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 issue. Under combined CPU and display load, a degraded or freshly fitted uncalibrated cell drops voltage faster than the fuel gauge IC predicts. The BIOS interprets the sudden sag as a hard cutoff threshold reached, even though the reported percentage still looks safe. The fix is one full calibration cycle — discharge to hibernate cutoff, then charge uninterrupted to 100%. After two or three of these cycles the fuel gauge IC maps its discharge curve to the new cell and the early shutdowns stop.\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 BIOS reads health data from the battery's EEPROM, which still carries the charge-cycle count and degradation flags written by the old cell. A new physical cell does not automatically reset that stored data. The laptop therefore reports poor health even though the replacement cell is fresh. Run the full discharge-to-hibernate then uninterrupted charge cycle described above — this triggers the BIOS learn cycle and rewrites the EEPROM health registers against the new cell's actual state. After one complete cycle, the health indicator should return to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410825347162,"sku":"BWCS-ADA440NB-1","price":82.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410825379930,"sku":"BWCS-ADA440NB-2","price":97.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410825412698,"sku":"BWCS-ADA440NB-3","price":107.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ADA440NB-1.webp?v=1779581286","url":"https:\/\/batteryweb.com\/products\/leo-designote-a360-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}