{"product_id":"hp-spectre-pro-x360-replacement-battery-114v-4900mah-li-polymer","title":"HP Spectre Pro X360 Compatible Battery PK03XL 11.4V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Spectre Pro X360 — 11.4V Li-Polymer Replacement Battery (PK03XL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.4V, 4900mAh Li-Polymer replacement battery for the HP Spectre Pro X360 and Spectre 13-4000 series convertible laptops. It carries OEM part numbers PK03XL, HSTNN-DB6S, and TPN-Q157, among others. Fit this cell when the original no longer holds a useful charge or fails to register in the OS at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpectre X360 convertible compatibility:\u003c\/strong\u003e\n    The Spectre Pro X360, Spectre 13-4003DX, and Spectre x360 Convertible PC all share the same three-cell Li-Polymer pack configuration, voltage rail, and connector pinout — which is why one SKU covers the full lineup including 162+ additional Spectre variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the Spectre x360 platform, confirmed the BMS handshake completed correctly, and verified the fuel gauge IC accepted the new cell data without throwing a fault code.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration for the Spectre X360:\u003c\/strong\u003e\n    After fitting, 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 on first boot 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\"\u003eWhy the Spectre X360 BIOS reports poor battery health immediately after a swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Spectre X360 BIOS reads health data from EEPROM written by the original factory cell. When a replacement cell is installed, that EEPROM data no longer matches the new chemistry profile, so the BIOS flags the battery as degraded or unknown before any real testing occurs. This is a data mismatch, not a fault with the replacement cell. Running HP's battery learn cycle — one full discharge to hibernate cutoff followed by an uninterrupted charge to 100% — overwrites the stale EEPROM reference and clears the warning.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSpectre X360 shutting down at 20–30% charge shown on screen\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 discharge data, but the new cell hits its voltage cliff earlier in the curve than the stale model predicts. The laptop shuts down because real voltage drops below safe threshold while the gauge still shows charge remaining. Run two full discharge-to-hibernate and uninterrupted-charge cycles — after the second cycle the gauge recalibrates and the shutdown should resolve at or below 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409738563674,"sku":"BWCS-HPX134NB-1","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409738596442,"sku":"BWCS-HPX134NB-2","price":124.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409738629210,"sku":"BWCS-HPX134NB-3","price":136.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPX134NB-1.webp?v=1779580583","url":"https:\/\/batteryweb.com\/products\/hp-spectre-pro-x360-replacement-battery-114v-4900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}