{"product_id":"issam-smartbook-i-8090-replacement-battery-144v-4400mah-li-ion","title":"ISSAM SmartBook I-8090 Replacement Battery 14.4V 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eISSAM SmartBook I-8090 — 14.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 4400mAh (63.36Wh) Li-ion replacement battery for the ISSAM SmartBook I-8090 notebook. It slots into the original battery bay and connects to the same charging circuit the laptop expects. No OEM part number exists for this unit — fitment is confirmed against the SmartBook I-8090 chassis.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSmartBook I-8090 fitment:\u003c\/strong\u003e\n    The I-8090 runs a 14.4V battery rail with a specific cell configuration and connector pinout. This replacement matches that voltage and connector exactly, so the BIOS recognises the pack without a handshake error on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge, idle draw, and sustained CPU load on the I-8090 platform. The BMS held cutoff at the correct low-voltage threshold and did not trip on standard display-plus-processor draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install discharge cycle on the I-8090:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge down to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data 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\"\u003eBIOS reporting battery health as poor after swapping in this cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe I-8090 BIOS reads health data stored in the battery pack's EEPROM. When a new cell goes in, the EEPROM data does not match the charge history the BIOS was tracking on the old pack. The system flags this mismatch as poor health even though the new cells are fine. One full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle and brings the health readout back to accurate.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff symptom. Under combined CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, and the battery hits the BMS low-voltage cutoff before the OS gauge reaches zero. The gauge was calibrated against the old, degraded cell curve — it does not yet know where the new cell's voltage cliff sits. Run two to three full discharge-and-charge cycles and the fuel gauge IC will recalibrate its curve to the new cells, pushing the shutdown point back toward 5–8%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410861785178,"sku":"BWCS-FUV2000NB-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410861817946,"sku":"BWCS-FUV2000NB-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410861850714,"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\/issam-smartbook-i-8090-replacement-battery-144v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}