{"product_id":"hp-envy-13-replacement-battery-148v-2700mah-li-polymer","title":"HP Envy 13 HSTNN-IB99 Compatible Battery 14.8V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Envy 13 Series — 14.8V Li-Polymer Replacement Battery (HSTNN-IB99)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 2700mAh (39.96Wh) Li-Polymer battery for the HP Envy 13 ultrabook lineup. It fits the Envy 13, Envy 13-1000, Envy 13-1001TX, Envy 13-1002TX, and over 20 additional Envy 13 variants. OEM cross-references include HSTNN-IB99, HSTNN-XB99, BD04, and 538334-001.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnvy 13 series compatibility:\u003c\/strong\u003e\n    These models share a common 14.8V four-cell Li-Polymer architecture, the same physical connector pinout, and an identical BMS handshake protocol — which is why one cell services the entire Envy 13-1000 sub-series without modification.\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 controlled discharge on an Envy 13-1000 chassis. The BMS negotiated charge correctly, cell balancing stayed within spec, and no overcurrent trips occurred across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install cycle on the Envy 13:\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 after swapping cells in these 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  \u003cp class=\"bpw-desc-p\"\u003eHP's BIOS reads health data stored in the battery's EEPROM, not from live cell measurements. When a new cell is installed, the EEPROM profile doesn't match the host system's charge history, so the BIOS flags the battery as degraded or unknown before a single cycle runs. This is a data mismatch, not a faulty cell. Run one full discharge-to-hibernate then a full uninterrupted charge to 100% — the BIOS learn cycle rewrites its reference data and the health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEnvy 13 shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell can no longer hold voltage under combined CPU and display load — the voltage drops below the BMS cutoff threshold even though the fuel gauge still reads 20–30%. The fuel gauge IC calculates remaining charge from a model built on the old cell's behaviour, so its readout lags behind actual cell state. The fix is calibration: let the laptop discharge fully to automatic hibernate, then charge uninterrupted to 100% twice. After two calibration cycles the fuel gauge IC recalibrates against the new cell and shutdown below 30% stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409764286554,"sku":"BWCS-HPE130NB-1","price":124.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409764319322,"sku":"BWCS-HPE130NB-2","price":143.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409764352090,"sku":"BWCS-HPE130NB-3","price":157.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPE130NB-1.webp?v=1779580789","url":"https:\/\/batteryweb.com\/products\/hp-envy-13-replacement-battery-148v-2700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}