HP Laptop Battery Replacement Guide: Pavilion, EliteBook, Envy & More
Cao Chuanping
An HP laptop that won't hold charge needs a battery matched by product number and battery code. You'll see that the code on the pack, like HT03XL or SU06XL, is the single best identifier. Match the code, voltage, and connector, and the new pack fits. This guide shows you where to find each one and how to install the pack.
Replacing an HP battery follows the same path as any laptop. Confirm the battery is the problem with a Windows battery report. Find your product number on the label, with Fn + Esc, or in the BIOS. Read the battery code off the old pack and cross-check it in HP PartSurfer. Then swap the pack in; the only HP-specific quirk is that some bottom-cover screws hide under the rubber feet. Order by battery code from a supplier that covers the pack with a warranty.
Does Your HP Actually Need a New Battery?
HP's own battery documentation rates standard packs for more than 300 charge cycles and long-life packs for up to 1,000. Exceed that mark and the battery holds noticeably less charge than it did new.
The signs line up fast. Runtime collapses, the laptop dies while still showing 20 to 30 percent, the charge level sticks at one number, or the machine only runs on AC. Before buying a pack, confirm with a free check: open a command prompt and run powercfg /batteryreport. Windows saves an HTML report to your user folder. Compare Design Capacity with Full Charge Capacity. Below about 80 percent of design capacity, the battery is done.
| Symptom | Likely cause | What to do |
|---|---|---|
| Dies at 20–30% while showing charge | Cells can't hold voltage under load | Replace the battery |
| Runtime a fraction of what it was | Normal capacity loss | Run the battery report, then decide |
| Charge level sticks at one percentage | Dead cell group | Replace the battery |
| Only runs plugged in | Battery can't hold a charge | Replace the battery |
| Trackpad lifted or case bulging | Swollen battery, a fire risk | Stop using it; see our swollen battery guide |
If the report looks healthy but the laptop still dies fast, the drain comes from settings. Our guide on why your laptop battery drains fast covers those fixes. For the full workflow, start at the pillar guide.
How to Confirm Your HP Model and Product Number
HP prints both a model name and a product number on the underside label. The product number is the precise identifier. Pavilion 15 sounds specific, but HP built dozens of Pavilion 15 configurations with different packs. The product number pins yours down.
| Method | How |
|---|---|
| Bottom label | Flip the laptop over. The model name and product number sit on the sticker. |
| Fn + Esc | Press the two keys together inside Windows. HP shows the model and product number on screen. |
| BIOS | Press F10 at power-on. The Main page lists the product number. |
Enter that product number on HP's support site and you'll see the battery specification your machine shipped with. It also links to the service and maintenance guide for your model, which lists the battery part numbers.
How to Find Your HP Battery Part Number
HP batteries have two kinds of codes. The battery code is a short name like HT03XL or SU06XL. The part number is longer, like L11119-855. Both live on the pack label. On removable batteries the label is visible from the bay. On internal batteries it's on the pack once the bottom cover is off.
One battery usually carries several equivalent numbers. The HT03XL is also listed as L11119-855, L11421-542, HSTNN-UB7J, HSTNN-DB8R, and HT03041XL. Search by any of them and you'll land on the same pack.
HP's own tool does the lookup for you. Open HP PartSurfer, enter your serial number, and it lists every part for your exact machine, including the battery part number and its description. That's the most reliable cross-check when the label is worn or unreadable.
Match the battery code, the voltage, and the connector, and the pack fits. Capacity in Wh can be equal or higher; HP often shipped two capacities in the same line, and the higher one just runs longer.
I've learned that matching the battery code beats trusting the model name. One Pavilion 15 line alone spans several codes, and the wrong one won't seat or won't charge.
HP Battery by Sub-Series
HP battery families follow the product lines. Narrow down by line, then confirm by battery code.
| Line | Typical packs | Examples we stock |
|---|---|---|
| Pavilion (consumer mainstream) | Highest-volume range | HT03XL (Pavilion 14/15/17 series) $39.99 |
| Envy (premium consumer) | Slim internal packs | KC04XL (Envy 13) $39.99; PI06XL (Envy 15) $39.99; LK03XL (Envy x360 15) $69.99 |
| Spectre (premium ultrabooks) | Model-specific parts | CP03XL (Spectre x360 13) $39.99; SU06XL (Spectre x360 15-df) $99.99 |
| EliteBook / ProBook (business) | Long-life packs, many part numbers | CX03XL (EliteBook x360 830 G7/G8, 855 G7) $49.99 |
| Omen / Victus (gaming) | High-capacity internal packs | SD03XL (Omen 15-ek) $69.99 |
Prices as of August 2026. The full range lives in the HP collection.
How to Install an HP Laptop Battery
Two designs. Older Pavilion and ProBook models use an external latch-release pack: power down, unplug, release the latch, and slide the pack out. No tools, seconds.
Newer HP laptops use an internal pack, and HP hides a few bottom-cover screws under the rubber feet. Peel the feet gently and you'll find them.
- Power off and unplug. Remove docks, USB devices, and SD cards.
- Remove the bottom-cover screws. Some hide under the rubber feet, so peel them gently. Keep screws sorted by length.
- Release the clips with a plastic pry tool and lift the cover. Skip metal tools.
- Disconnect the battery cable from the board first.
- Unscrew the pack and lift it out flat. Never bend or puncture it.
- Set the new pack in place, screw it down, and reconnect the cable.
- Snap the cover back, replace the screws, and charge to 100 percent.
After the swap, charge fully, run down to about 10 percent, and recharge. One or two cycles teaches the gauge the new pack.
If a new pack reads low on day one, I calibrate before I blame the battery. Most of the time the pack is fine and the gauge is wrong.
If the laptop doesn't recognize the new pack, check the cable seating first. Then run an EC reset: power off, unplug, hold the power button about 30 seconds, and boot again.
Buying a Replacement HP Battery
Once the battery code matches, choose between an OEM HP pack and a quality aftermarket pack. Cells and protection circuitry matter more than the logo; our OEM vs aftermarket comparison explains what to check on any listing.
Every pack in our HP collection is tested for fit and safety and carries a 1-year limited warranty against manufacturing defects. Returns are accepted within 30 days of delivery.
| Battery | Fits | Price |
|---|---|---|
| HT03XL | Pavilion 14, 15, 17 series | $39.99 |
| CP03XL | Spectre x360 13-ae series | $39.99 |
| CX03XL | EliteBook x360 830 G7 / G8, 855 G7 | $49.99 |
| LK03XL | Envy x360 15-bp series | $69.99 |
| SD03XL | Omen 15-ek | $69.99 |
| SU06XL | Spectre x360 15-df series | $99.99 |
Prices as of August 2026. Check the battery code on your label before ordering.
For an HP that's out of warranty, I'd buy a quality aftermarket pack every time. The battery code does the matching work, and the logo is what you pay extra for.
Don't forget that listings saying "compatible with Pavilion 15" without naming a battery code are usually guesswork, and "refurbished" OEM packs are often old batteries with new labels. Buy from a supplier that names the code and backs it with a warranty.
Frequently Asked Questions
How do I find the right battery for my HP laptop?
Match the battery code and part number printed on the old pack, such as HT03XL / L11119-855. Cross-check with your product number on HP's support site or in HP PartSurfer, which lists the battery for your exact serial number.
Where do I find my HP product number?
On the label on the underside of the laptop. In Windows, press Fn + Esc. At power-on, press F10 and look on the BIOS Main page.
What is HP PartSurfer?
HP's official parts lookup tool. Enter your serial number and it lists every part for your exact laptop, including the battery part number and description.
Can I use a higher-capacity battery in my HP laptop?
Yes, when the battery code family matches and the voltage and connector are the same. HP lines often shipped 41Wh and 61Wh versions; the higher Wh pack just runs longer.
How do I know if my HP battery needs replacing?
Run powercfg /batteryreport in a command prompt and compare Design Capacity with Full Charge Capacity. Below about 80 percent of design, the battery has reached the end of its life.
References & Sources
- HP — How to Perform an HP Laptop Battery Replacement. Supports the model/product-number lookup, the battery finder, and the recommendation to match the exact pack.
- HP — HP Consumer Notebooks: Understanding Battery Warranty. Supports the 300-cycle rating for standard packs and the 1,000-cycle rating for long-life packs.
- Dell — How to Generate a Battery Report Using the POWERCFG Command. Supports the Windows battery report steps used in this guide.
Found your HP battery code?
Every pack is tested for fit and safety and covered by a 1-year limited warranty.
Browse HP Batteries →More from the Laptop & Notebook Battery guide hub:
- → Pillar: Laptop Battery Replacement Guide
- → Dell Laptop Battery Replacement
- → Lenovo Laptop Battery Replacement: ThinkPad, IdeaPad & Legion
- → Swollen Laptop Battery: Is It Dangerous and What to Do
- → How to Find the Right Replacement Battery for Your Laptop
- → OEM vs Aftermarket Laptop Batteries
- → Why Your Laptop Battery Drains Fast (and How to Fix It)
