{"product_id":"aopen-1547-replacement-battery-144v-4400mah-li-ion","title":"AOPEN 1547 Replacement Battery 14.4V 4400mAh 90.NBI61.001","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAOPEN 1547 \/ 1555 \/ 1556 \/ 1557 — 14.4V Li-ion Replacement Battery (90.NBI61.001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V 4400mAh (63.36Wh) Li-ion replacement battery for AOPEN notebook computers. It fits the 1547, 1555, 1556, and 1557 models. The OEM part number cross-references include 90.NBI61.001, BTP-52EW, BTP-89BM, BTP-90BM, and 805N00005, among others.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1547\/1555\/1556\/1557 battery platform:\u003c\/strong\u003e\n    These four models share the same 14.4V battery rail, connector pinout, and BMS handshake protocol. One cell fits all four without adapter changes or firmware workarounds.\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 1555 unit. The BMS negotiated correctly at first contact, reported full capacity to the OS, and thermal cutoff held within spec under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the AOPEN 1547 series:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in the OS 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\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe AOPEN 1547 series BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported values. When those values don't match its learned baseline, it flags the battery as degraded — even on a brand-new cell. This is not a fault with the replacement. Run one full calibration cycle: discharge to hibernate, then charge uninterrupted to 100%. After one or two cycles the BIOS recalibrates its learn table and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down hard at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC still holds calibration data from the old, degraded cell. It maps the new cell's voltage curve incorrectly and triggers a shutdown well before actual depletion. The fix is a full calibration cycle — discharge to the point the laptop hibernates on its own, then charge without interruption to 100%. After two cycles the fuel gauge IC re-maps the voltage curve against the new cell and the displayed percentage tracks accurately. Check the OS battery report after the second cycle — remaining capacity should read at or above 60,000mWh.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410861523034,"sku":"BWCS-FUV2000NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410861555802,"sku":"BWCS-FUV2000NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410861588570,"sku":"BWCS-FUV2000NB-3","price":116.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FUV2000NB-1.webp?v=1779581377","url":"https:\/\/batteryweb.com\/products\/aopen-1547-replacement-battery-144v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}