{"product_id":"clevo-m660-replacement-battery-111v-6600mah-li-ion","title":"Clevo M660 11.1V Replacement Battery 90-NFY6B1000Z","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClevo M660 \/ M661 \/ M665 — 11.1V Li-ion Replacement Battery (90-NFY6B1000Z)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V 6600mAh (73.26Wh) lithium-ion battery for the Clevo M660, M661, and M665 notebooks. It replaces the original cell when capacity has degraded to the point where the laptop no longer holds a useful charge. The connector, BMS handshake, and physical dimensions match the OEM battery exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM660, M661, M665 platform fit:\u003c\/strong\u003e\n    These three models share the same battery bay dimensions, 11.1V voltage rail, and BMS communication protocol. One cell covers all three without any modification to the battery compartment or firmware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on M-series hardware. The BMS communicated correctly with the BIOS, reported accurate state-of-charge data, and the protection circuit triggered at expected voltage limits without false cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the M660 series:\u003c\/strong\u003e\n    After fitting this battery, run the laptop down to automatic hibernate-cutoff under normal use, then charge uninterrupted to 100% without interruption. This resets the BIOS battery learn cycle 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\"\u003eBIOS reporting poor battery health immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M660 BIOS reads EEPROM data embedded in the battery pack to assess health. When a new cell is installed, that EEPROM data does not match the usage history the BIOS has stored for the old pack, triggering a false \"poor health\" or \"replace battery\" warning. This is not a fault with the replacement cell. Running one full discharge-to-hibernate then a complete uninterrupted charge to 100% allows the BIOS to rebuild its battery profile against the new cell and clear the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on the fuel gauge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual charge curve. The IC carries over voltage-to-capacity mapping from the old, degraded cell, so it misreads the remaining capacity and cuts power before the battery is actually depleted. It is not a fault with the replacement battery. Run two to three full discharge-to-hibernate and full charge cycles — after the third cycle the fuel gauge IC recalibrates and the shutdowns stop. Confirm calibration is complete when the laptop reaches hibernate at or below 5% shown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410817286234,"sku":"BWCS-AUF3HB-1","price":118.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410817319002,"sku":"BWCS-AUF3HB-2","price":135.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410817351770,"sku":"BWCS-AUF3HB-3","price":148.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AUF3HB-1.webp?v=1779581181","url":"https:\/\/batteryweb.com\/products\/clevo-m660-replacement-battery-111v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}