{"product_id":"clevo-w251el-replacement-battery-111v-4400mah-li-ion","title":"Clevo W251EL Replacement Battery 11.1V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eClevo W251EL Series — 11.1V Li-ion Replacement Battery (6-87-W15ES-4V4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.1V, 4400mAh (48.84Wh) lithium-ion replacement battery for the Clevo W251EL and W251ELQ notebooks, as well as Zoostorm B980 and 7872-9043\/A models. It replaces OEM parts including 6-87-W15ES-4V4, 6-87-W15ES-4YP, VNB142, W240BAT-6, W240BUBAT-3, and W240BUBAT-6. If the original cell has degraded or stopped holding a charge, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eW251EL and Zoostorm B980 compatibility:\u003c\/strong\u003e\n    These models share the same 11.1V battery bay, six-cell configuration, and BMS handshake protocol — which is why a single part number covers all of them. The connector pinout and charge communication line are identical across the platform.\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 W251-series hardware. The BMS negotiated correctly with the charging circuit, current tapered as expected at the top-of-charge threshold, and no protection trips occurred under sustained CPU and display load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration on the W251EL:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. 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 fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe W251EL stores capacity and health data in the EEPROM of the old battery pack. When a new cell goes in, the BIOS compares the new cell's reported data against the stored history and flags a mismatch as poor health. This is a data problem, not a cell problem. Running one full discharge-to-hibernate then a clean 100% charge lets the system rewrite its baseline. After one or two cycles the health indicator updates correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on the W251EL\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 voltage curve. The OS reads a percentage based on old learned data, so the displayed figure and real cell voltage drift apart. When the cell hits its true low-voltage cutoff — around 9V under combined CPU and display load — the system shuts off even though the gauge still shows charge remaining. Run two full discharge-to-hibernate cycles followed by uninterrupted charges to 100%, and the gauge IC re-anchors to the new cell's curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409557651546,"sku":"BWCS-CLW251NB-1","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409557684314,"sku":"BWCS-CLW251NB-2","price":94.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409557717082,"sku":"BWCS-CLW251NB-3","price":104.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CLW251NB-1.webp?v=1779580013","url":"https:\/\/batteryweb.com\/products\/clevo-w251el-replacement-battery-111v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}