HP EL04XL Replacement Battery for HP Envy 4 Series

HP EL04XL battery is a replacement lithium-ion battery designed for HP Envy 4 series laptops including Envy 4-1000, 4-1001, 4-1002, 4-1003, 4-1004, 4-1005 and related Envy TouchSmart 4 models. It is built to restore original battery performance for ultrathin HP Envy laptops experiencing fast battery drain, charging failure or reduced backup time. This battery typically features a 4-cell slim design with around 3500mAh capacity or 52Wh energy rating depending on the variant and operates at 14.8V which is standard for this series. It supports multiple part numbers such as 681879-121, 681879-171, 681879-541, 681949-001, EL04052XL, HSTNN-IB3R and HSTNN-UB3R depending on the exact model configuration. It is compatible with HP Envy 4-1000 series models including 4-1003TX, 4-1004TX, 4-1005TX, 4-1010TX and other closely related variants. It delivers stable voltage output, reliable performance and long cycle life for everyday use such as browsing, office work and media tasks. Always confirm your original battery part number before purchase to ensure compatibility.