{"product_id":"quanta-sw1-replacement-battery-111v-4400mah-li-ion","title":"Quanta SW1 Replacement Battery 11.1V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eQuanta SW1 \/ TW3 \/ TW5 Series — 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 Quanta SW1, TW3, TW3A, and TW5 laptops. It fits the original battery bay and connects to the same charging circuit used by the factory cell. Install it when the existing battery no longer holds a charge or fails to power the machine off AC.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSW1, TW3, TW5, TW3A compatibility:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell architecture, battery connector pinout, and BMS communication protocol — one cell fits the full group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, full-load discharge, and BMS handshake verification. The protection circuit responded correctly to overvoltage, undervoltage, and short-circuit conditions on each run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on Quanta notebooks:\u003c\/strong\u003e\n    After fitting this cell, run one full discharge until the laptop hibernates, 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\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eQuanta's BIOS reads health data stored in the battery's EEPROM — not from live cell measurements. The old EEPROM values carry over context from the degraded cell, so the firmware flags poor health even though the new cell is fully functional. Running a complete learn cycle — full discharge to hibernate cutoff followed by an uninterrupted charge to 100% — overwrites the cached data. After one or two full cycles the reported health figure corrects itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge IC reaches its predicted empty point. The gauge IC was calibrated against the old, degraded cell and its discharge curve no longer matches the new chemistry. The fix is two to three full discharge-recharge cycles so the IC re-learns the actual voltage-to-capacity curve of the replacement cell. After calibration, the reported percentage and the real cutoff voltage align — target a resting voltage of 11.1V at the 100% mark before starting the final calibration discharge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410851954778,"sku":"BWCS-AUF3NB-1","price":73.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410851987546,"sku":"BWCS-AUF3NB-2","price":86.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410852020314,"sku":"BWCS-AUF3NB-3","price":95.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF3NB-1.webp?v=1779581357","url":"https:\/\/batteryweb.com\/products\/quanta-sw1-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}