{"product_id":"hp-envy-x2-11-replacement-battery-37v-6750mah-li-polymer","title":"HP Envy X2 11 Replacement Battery 3.7V 6750mAh HSTNN-IB4B","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHP Envy X2 11 — 3.7V Li-Polymer Replacement Battery (HSTNN-IB4B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 6750mAh lithium-polymer battery fits the HP Envy X2 11 detachable tablet. It replaces OEM part numbers HSTNN-IB4B, DW02XL, HSTNN-DB4B, and 694398-2C1. Fits the Envy X2 11 base tablet unit, including models TPN-104, 11-G012NR, and 11-G010NR.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnvy X2 11 tablet platform:\u003c\/strong\u003e\n    These models share the same flat Li-Polymer cell format, connector pinout, and BMS communication protocol. The 265.75 × 96.04 × 3.60 mm cell slots into the tablet chassis without modification, and the BMS handshake with the HP EC firmware runs identically across the listed model variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an Envy X2 11 unit. The BMS accepted the new cell without fault flags, charge IC negotiation completed normally, and voltage held steady across the display-plus-WiFi load profile typical of this tablet.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After installing this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. The HP EC firmware calibrates its fuel gauge IC against the old cell's wear curve — one complete cycle resets that calibration against the new cell and clears inaccurate percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Envy X2 11 shuts down at 15–25% after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HP embedded controller tracks a learned voltage-discharge curve from the original cell. A new cell has a different internal resistance and voltage slope at low charge states. When the EC sees the voltage drop faster than its stored curve predicts — typically under combined display brightness and WiFi load — it triggers an emergency cutoff before the gauge reaches 0%. One full calibration cycle teaches the EC the new cell's actual low-voltage behaviour and eliminates the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after battery replacement on the Envy X2 11\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Envy X2 11 charge IC runs a negotiation sequence with the battery BMS on the first charge cycle after a new cell is installed. Until that handshake completes successfully, the firmware defaults to a conservative slow-charge rate as a safety measure. Plug in via the original HP AC adapter and allow one full uninterrupted charge to 100% — do not disconnect partway through. After that cycle, the charge IC accepts the higher rate and fast charging resumes at the expected wattage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426018295898,"sku":"BWCS-HPX211SL-1","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426018328666,"sku":"BWCS-HPX211SL-2","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426018361434,"sku":"BWCS-HPX211SL-3","price":86.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HPX211SL-1.webp?v=1779930219","url":"https:\/\/batteryweb.com\/products\/hp-envy-x2-11-replacement-battery-37v-6750mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}