{"product_id":"quanta-tw8-replacement-battery-111v-4400mah-li-ion","title":"Quanta TW8 11.1V Replacement Battery SQU-805 4400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eQuanta TW8 \/ SW8 \/ DW8 Series — 11.1V Li-ion Replacement Battery (SQU-805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion battery for the Quanta TW8, SW8, DW8, and EAA-89 notebook series. It replaces OEM part numbers SQU-804, SQU-805, SQU-807, and SW8-3S4400-B1B1, among others. The cell slots into the same bay as the original and uses the same three-pin connector arrangement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTW8 \/ SW8 \/ DW8 platform compatibility:\u003c\/strong\u003e\n    These models share a common 11.1V three-cell rail, the same physical bay dimensions, and the same BMS communication line. One replacement part covers all three variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on a TW8 platform. The BMS handshake completed correctly, charge acceptance reached the rated 4400mAh, and the protection circuit tripped at the expected low-voltage cutoff without false trips at partial discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the TW8:\u003c\/strong\u003e\n    After fitting the new cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell chemistry and clears the inaccurate health 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 TW8 shuts down at 20–30% shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a cell ages, its internal resistance rises. Under full CPU and display load, voltage drops faster than the fuel gauge IC can track. The cell hits the BMS low-voltage cutoff while the gauge still reads 20–30%. A new cell at 4400mAh has lower internal resistance, so voltage holds steadier under the same load. After two to three full calibration cycles, the fuel gauge IC re-learns the discharge curve and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"unknown\" after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. That EEPROM carries wear data written by the old cell over its lifetime. A replacement cell ships with a fresh EEPROM, which the BIOS interprets as a mismatch and flags as poor or unknown. Running the battery learn cycle — full discharge to hibernate, then an uninterrupted charge to 100% — lets the BIOS rewrite its reference data against the new cell. Check BIOS battery status after the first complete cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409823105114,"sku":"BWCS-FQU804NB-1","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409823137882,"sku":"BWCS-FQU804NB-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409823170650,"sku":"BWCS-FQU804NB-3","price":118.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/batteryweb.com\/products\/quanta-tw8-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}