{"product_id":"toshiba-portege-x20w-replacement-battery-114v-3650mah-li-polymer","title":"Toshiba Portege X20W Replacement Battery PA5267U-1BRS 11.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eToshiba Portege X20W Series — 11.4V Li-Polymer Replacement Battery (PA5267U-1BRS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V 3650mAh (41.61Wh) Li-Polymer replacement battery for the Toshiba Portege X20W ultrabook series. It fits the X20W, X20W-D, X20W-D-10E, X20W-D-10Q, and over fifteen additional X20W-D variants. The OEM part number is PA5267U-1BRS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eX20W-D series fit:\u003c\/strong\u003e\n    All X20W-D variants share the same 11.4V three-cell Li-Polymer architecture, flat form factor, and BMS connector pinout. One replacement cell covers the entire sub-range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the X20W-D platform and logged BMS communication, charge acceptance, and cutoff behaviour. The BMS handshake completed on first connection and charge progressed normally from 0% through to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting, run the laptop down to hibernate cutoff, then charge uninterrupted to 100% without using the machine. 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 battery health as poor immediately after replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe X20W-D BIOS reads health data stored in the outgoing cell's EEPROM and compares it against the new cell's reported state. A fresh cell with no charge history looks statistically abnormal to the firmware, so it flags the battery as degraded. This is not a fault with the replacement cell. Run one full discharge-to-hibernate, then a full uninterrupted charge to 100%, and the BIOS learn cycle will update its baseline. After one or two cycles the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePortege X20W shutting down at 20–30% charge shown\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old, degraded cell. The IC predicts remaining capacity based on historical discharge curves, and a new cell with higher actual capacity throws those curves off. The laptop hits what the firmware reads as a voltage cliff and triggers shutdown before the cell is genuinely empty. Run two full discharge-to-hibernate cycles, charging to 100% each time, and the fuel gauge IC will recalibrate against the new cell's actual voltage profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409521836122,"sku":"BWCS-TOX210NB-1","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409521868890,"sku":"BWCS-TOX210NB-2","price":95.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409521901658,"sku":"BWCS-TOX210NB-3","price":106.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TOX210NB-1.webp?v=1779579941","url":"https:\/\/batteryweb.com\/products\/toshiba-portege-x20w-replacement-battery-114v-3650mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}