{"product_id":"winbook-w200-replacement-battery-148v-4400mah-li-ion","title":"WinBook W200 Replacement Battery 14.8V 4400mAh 40011708","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWinBook W200 \/ W235 — 14.8V Li-ion Replacement Battery (40011708)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 4400mAh (65.12Wh) Li-ion battery for the WinBook W200 and W235 notebook computers. It replaces OEM part numbers including 40011708, BP-8011, and the 4420685 series variants. Install it when the original cell no longer holds enough charge for portable use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eW200 and W235 compatibility:\u003c\/strong\u003e\n    Both models share the same 14.8V battery rail, connector pinout, and BMS handshake protocol — one cell fits both. The pack communicates state-of-charge data over the SMBus line to the laptop's fuel gauge IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and discharge on the bench, confirmed BMS balancing across all four cell groups, and verified the SMBus data exchange reported correct voltage and capacity values to the host system.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration after install:\u003c\/strong\u003e\n    After fitting this battery, run the laptop from full charge down to automatic hibernate cutoff, then charge uninterrupted to 100%. This single cycle resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on these WinBook models.\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 W200 BIOS reads health data from EEPROM registers written by the previous cell's BMS — not from the new pack directly. When a fresh battery installs, those stale registers still reflect the degraded state of the old cell. The laptop flags the new pack as poor health before it runs a single learn cycle. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the registers and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC's calibration data still maps to the old, worn cell's voltage curve. Under full CPU and display load, the new cell delivers more current than the old one did — the voltage-to-capacity mapping no longer fits, so the gauge reads 20–30% while the cell is actually approaching its cutoff voltage. Two to three complete discharge-and-charge cycles recalibrate the gauge against the new cell. After calibration, the gauge should track accurately from 100% down to the BMS low-voltage cutoff at approximately 11.1V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410833473626,"sku":"BWCS-AC8011HB-1","price":74.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410833506394,"sku":"BWCS-AC8011HB-2","price":86.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410833539162,"sku":"BWCS-AC8011HB-3","price":95.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC8011HB-big.webp?v=1779581320","url":"https:\/\/batteryweb.com\/products\/winbook-w200-replacement-battery-148v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}