The Envy 17 uses an internal lithium-ion battery, and the exact part depends on your build year and configuration. Common matches across this line include HSTNN-LB40 and 921408-2C1, with packs running from 7.7 to 19.0 volts and roughly 38 to 86 Wh. Because the 17-inch chassis often carries a larger capacity pack, you should confirm the part number printed on your current battery before ordering. Replacements in this category run $67.99 to $82.99.

Check the part number printed on your current battery (for example HSTNN-LB6K or 816497-1C1), since that is the most reliable match. If you cannot open the laptop, use the 4th, 5th, and 6th characters of your serial number to identify the build, or note your full model number such as the specific Envy 15 or Envy 360 variant. With 57 distinct part numbers covering about 2965 models, matching the exact code keeps voltage (7.7 to 19.0 V) and capacity correct.

Envy replacement batteries in this category run from $67.99 to $82.99. The price varies by capacity and cell count, so a smaller 3-cell pack for an Envy 13 sits at the lower end, while a higher-capacity 4-cell unit for an Envy 17 lands toward the top. All packs in this range are lithium-ion, rated between 7.7 and 19.0 volts and about 38 to 86 Wh. Matching your exact part number, such as HSTNN-DB8P, ensures you get the correct pack for the price.

No, not across the board. While many Envy laptops share a chassis size, the line uses 57 different part numbers spanning 7.7 to 19.0 volts and 38 to 86 Wh, so a pack from one model may not fit or power another. For example, one Envy 17 may take HSTNN-LB40 while another uses 921408-2C1. Always match the specific part number printed on your battery rather than assuming two same-size Envy models share the same unit.

The main differences are capacity, cell count, and physical fit. Smaller sub-series like the Envy 13 and Envy 14 use lower-capacity 3-cell packs, while the Envy 16 and Envy 17 carry larger 4-cell units closer to 86 Wh. The Envy 360 convertibles use packs shaped for the 2-in-1 layout. Voltage ranges from 7.7 to 19.0 V across the line. Part numbers such as LE03048XL-PR and HSTNN-LB6K are tied to specific sub-series and years, so they are not cross-compatible.

The part number is printed directly on the battery label, shown as codes like 816497-1C1 or HSTNN-DB8P. On most Envy models the battery is internal, so you remove the bottom case to read it. If you would rather not open the laptop, use the 4th, 5th, and 6th characters of the serial number on the base sticker to identify your build, then match it to one of the 57 part numbers in this category covering about 2965 models.

Yes, with basic tools and care. Most Envy batteries are internal, so you power down, remove the screws on the bottom case, lift the panel, disconnect the old pack, and seat the new one. The process is similar across the Envy 13, 15, and 17, though screw counts and connector placement vary by model. Confirm your part number first (for example 921408-2C1), since the 7.7 to 19.0 V packs differ in size and connector between sub-series.

Watch for runtime that drops well below new, a charge percentage that jumps or stalls, the laptop shutting off unexpectedly, or a battery health warning in Windows.