{"product_id":"clevo-w655sf-replacement-battery-111v-4400mah-li-ion","title":"Clevo W655SF 11.1V Replacement Battery 6-87-W650S-4D4A1","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClevo W655SF Series — 11.1V Li-ion Replacement Battery (6-87-W650S-4D4A1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) Li-ion replacement battery for the Clevo W655SF and related notebooks. It fits a broad range of W650\/W655\/W670 series models sharing the same battery bay and connector geometry. Install it when the original cell no longer holds a useful charge or fails to register in the OS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eW650\/W655\/W670 series compatibility:\u003c\/strong\u003e\n    These models share the same 11.1V three-cell architecture, identical connector pinout, and BMS communication protocol over the SMBus line — which is why one part number covers the full range. The EEPROM data embedded in this cell matches what the Clevo EC firmware expects to read on first handshake.\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 W655-series hardware. The BMS completed charge termination cleanly at 12.6V, and the EC reported accurate state-of-charge without triggering a fault code or unknown-battery warning.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on W655 series:\u003c\/strong\u003e\n    After installation, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This forces the fuel gauge IC to map its thresholds against the new cell and clears the inaccurate health warning that the BIOS flags 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\n  \u003cp class=\"bpw-desc-p\"\u003eThe Clevo EC reads EEPROM data stored on the battery's BMS chip and compares it against cycle count and rated capacity. A brand-new cell still carries factory-default EEPROM values that the EC sometimes interprets as a degraded or foreign battery. This triggers the \"battery health poor\" or \"unknown battery\" flag in the BIOS health screen before a single charge cycle has run. One full discharge-to-hibernate followed by an uninterrupted charge to 100% lets the EC re-learn the cell's actual voltage curve and clears the flag on next boot.\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 is a voltage cliff, not a calibration error. Under full CPU and display load the cell voltage drops faster than the fuel gauge IC can track, and the EC triggers an emergency shutdown before the displayed percentage reaches zero. It usually means the fuel gauge was never calibrated against the new cell after installation. Run the full discharge-to-hibernate cycle once — this gives the fuel gauge IC real load data to anchor its low-voltage cutoff prediction. After calibration the shutdown threshold should align with the displayed percentage at or below 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409668538458,"sku":"BWCS-CLW650NB-1","price":75.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409668571226,"sku":"BWCS-CLW650NB-2","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409668603994,"sku":"BWCS-CLW650NB-3","price":97.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLW650NB-1.webp?v=1779580338","url":"https:\/\/batteryweb.com\/products\/clevo-w655sf-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}