{"product_id":"hp-spectre-13-v115tu-replacement-battery-77v-5200mah-li-polymer","title":"HP Spectre 13-V115TU Compatible Battery 7.7V 5200mAh BF04XL","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Spectre 13-V115TU — 7.7V Li-Polymer Replacement Battery (BF04XL \/ HSTNN-LB8C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.7V, 5200mAh (40.04Wh) lithium-polymer cell for the HP Spectre 13-V115TU ultrabook and its Y8J11PA \/ Y8J13PA variants. It fits the same connector, BMS handshake, and voltage rail as OEM part BF04XL. Use the Capacity field — 5200mAh — as the source of truth, not third-party listings.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpectre 13 V-series platform fit:\u003c\/strong\u003e\n    The V115TU and V117TU share the TPN-C132 battery bay, identical connector pinout, and the same BMS communication protocol. One cell covers both variants without any wiring or firmware 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 Spectre 13 platform and confirmed the BMS accepted the EEPROM handshake on first boot, reported voltage correctly, and began a charge cycle without triggering an unknown-battery fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, discharge the laptop to hibernate cutoff, then charge uninterrupted to 100% before unplugging. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears in HP Support Assistant 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 13 shuts down at 20–30% remaining after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Spectre 13 runs a combined CPU and display load that pulls hard on the cell during peak tasks. A new cell with an uncalibrated fuel gauge IC cannot accurately map its voltage curve to the remaining capacity, so the BIOS triggers a low-voltage shutdown before the gauge catches up. The cell still has charge — the system just doesn't know it yet. Two full discharge-to-hibernate and full-recharge cycles recalibrate the IC and push the shutdown point back to the correct level.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"Poor\" or \"Unknown\" after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eHP's BIOS reads EEPROM data embedded in the battery's BMS chip to display health status. When a new cell arrives, the EEPROM reports zero charge cycles and factory defaults — values the BIOS interprets as a degraded or unrecognised unit. This is not a fault with the cell. Run one complete discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%, then reboot and check HP Support Assistant — the health status will update once the learn cycle completes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409727684698,"sku":"BWCS-HPS115NB-1","price":97.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409727717466,"sku":"BWCS-HPS115NB-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409727750234,"sku":"BWCS-HPS115NB-3","price":128.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPS115NB-1.webp?v=1779580542","url":"https:\/\/batteryweb.com\/products\/hp-spectre-13-v115tu-replacement-battery-77v-5200mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}