HT03XL vs HW03XL vs LK03XL: A Spec-by-Spec Pavilion Battery Comparison
XiongYing Zeng
Same voltage, three different shapes. The HT03XL and HW03XL both hold 41.04Wh at 11.55V, but HP moved the connector and screw layout when it redesigned the Pavilion in 2021. A physical swap fails on both directions.
The LK03XL is the capacity outlier. Its 52.5Wh pack stores 11.46Wh more than the 41.04Wh packs. That extra energy translates to roughly 27% more runtime, about one extra hour on a Pavilion 15.
Some sellers list them as compatible. They are wrong. Listings that claim one pack covers HT03XL and HW03XL laptops sell returns. Always match the exact code printed on your current battery.
1. The Side-by-Side Spec Table
| HT03XL | HW03XL | LK03XL | |
|---|---|---|---|
| Voltage | 11.55V | 11.55V | 11.55V |
| Capacity | 41.04Wh | 41.04Wh | 52.5Wh |
| Cells | 3-cell | 3-cell | 3-cell |
| Connector exit | Side edge | Face | Side edge (different layout) |
| Fits | Pavilion 14/15/17, 2018โ2021 | Pavilion 15-eg/17-cn, 2021+ | Pavilion x360 15, Envy x360 15 |
| HP spare number | L11119-855 | L97300-005 | L09280-855 |
| Site product | Not stocked | HW03XL, $49.99 | LK03XL, $109.00 |
The table answers the most common question instantly: the two 41.04Wh packs differ only in connector position, while the 52.5Wh pack differs in capacity. All three carry the same voltage, which is exactly why sellers confuse them.
2. HT03XL: The 2018โ2021 Workhorse
HP shipped the HT03XL in more Pavilion configurations than any other pack. The 3-cell, 41.04Wh, 11.55V design covers Pavilion 14-ce/cf/ck/cm/df, 15-cs/cw/da/db/dw/dy, and 17-by/ca series, plus HP 240/250 G7 business notebooks.
| Model Families | Examples |
|---|---|
| Pavilion 14 | 14-ce, 14-cf, 14-ck, 14-cm, 14-df |
| Pavilion 15 | 15-cs, 15-cw, 15-da, 15-db, 15-dw, 15-dy |
| Pavilion 17 | 17-by, 17-ca |
| Business crossovers | HP 240 G7, 250 G7 |
The spare number L11119-855 anchors the family, with revision suffixes -856 and -857 referring to the same pack. Because the HT03XL shipped in such volume, it is also the most counterfeited Pavilion battery. Listings under $20 with stock photos rarely contain the Samsung or LG cells the label promises.
Our store doesn't stock the HT03XL. If your label reads HT03XL, order from a seller who lists the spare number L11119-855 and shows the side-edge connector in photos. In my experience, the connector position is the fastest counterfeit tell: real HT03XL packs exit the cable from the side edge, and photos that show a face-exit cable belong to a different battery.
3. HW03XL: The 2021+ Redesign
When HP refreshed the Pavilion line in 2021 (15-eg, 15-eh, 17-cn series), it kept the electrical spec and changed the shape. The HW03XL still reads 41.04Wh at 11.55V, but the connector moved from the side edge to the face, and the screw layout shifted.
The redesign makes the two packs physically incompatible in both directions. An HT03XL cannot sit in an HW03XL bay, and the reverse also fails. Sellers who list both codes on one product page sell wrong orders.
4. LK03XL: The Capacity Upgrade
The LK03XL breaks from the 41.04Wh pair entirely. Its 52.5Wh pack at 11.55V ships in Pavilion x360 15-inch convertibles and Envy x360 15 models, where the chassis has room for a taller cell stack.
The math is simple: 52.5Wh minus 41.04Wh equals 11.46Wh more stored energy. Divide that gain by the original 41.04Wh and you get a 28% increase, which works out to roughly one extra hour of runtime on a Pavilion 15 doing light work. For convertible owners, that hour matters on flights and in classrooms.
| HT03XL | LK03XL | Difference | |
|---|---|---|---|
| Capacity | 41.04Wh | 52.5Wh | +11.46Wh |
| Relative gain | โ | โ | +28% |
| Runtime on light work | ~4 hours | ~5 hours | ~1 extra hour |
| Thickness | Standard | +4.3mm | Needs a taller bay |
5. The Interchangeability Truth Table
| You Have | You Want | Works? | Why |
|---|---|---|---|
| HT03XL | HW03XL | ๐ด No | Connector moved from side to face in 2021 |
| HW03XL | HT03XL | ๐ด No | Screw layout differs, pack does not seat |
| HT03XL | LK03XL | ๐ก Only if the bay fits | Same side connector on some models, 4.3mm thicker |
| LK03XL | HT03XL | ๐ก Rarely | Downgrade, needs the smaller bay to accept the larger pack |
| HW03XL | LK03XL | ๐ด No | Different connector family |
The truth is, two red rows in this table cause most of the returns I see. People order the "same voltage" pack without checking the connector, and it arrives looking right but seating wrong. The connector photo check prevents both red-row mistakes.
6. The Upgrade Decision: HT03XL to LK03XL
The one legitimate upgrade path runs from the 41.04Wh HT03XL to the 52.5Wh LK03XL, and only on models whose battery bay fits the thicker pack. Here is the decision flow:
| Your Situation | Decision |
|---|---|
| Connector matches, bay has a raised cell area, manual lists LK03XL | Upgrade. Gain 28% runtime. |
| Connector exits from the face | Stop. The upgrade does not fit your model. |
| Connector matches but the bay is flat and shallow | Stay with the 41.04Wh pack. |
7. How to Tell Which One You Have
| Signal | Points To |
|---|---|
| Pavilion 14-ce/15-cs/15-da era (2018โ2021), cable exits the side | HT03XL |
| Pavilion 15-eg/17-cn (2021+), cable exits the face | HW03XL |
| Pavilion x360 15 or Envy x360 15 convertible | LK03XL |
| Spare number on the white sticker | L11119-855 = HT03XL, L97300-005 = HW03XL, L09280-855 = LK03XL |
From what I've seen, the spare number settles every argument. The white sticker survives longer than the main label, and the number maps one-to-one to the pack. Read the sticker, match the number, and the comparison above becomes a confirmation instead of a guess.
Need the full Pavilion series map, not just these three packs? The master lookup table covers 14 Pavilion series with battery codes, voltages, and capacities.
HP Pavilion Battery Compatibility: The Master Lookup Table โFrequently Asked Questions
Are HT03XL and HW03XL interchangeable?
No. Both packs read 41.04Wh at 11.55V, but HP moved the connector from the side edge (HT03XL) to the face (HW03XL) when it redesigned the Pavilion in 2021, and the screw layouts differ. Neither pack seats in the other's bay. Sellers who list both codes on one product page sell wrong orders.
Can I upgrade my Pavilion from HT03XL to LK03XL?
Yes, on models whose battery bay fits the thicker pack. Check three things first: the connector must match (both exit from the side on compatible models), the bay must hold a pack roughly 4.3mm thicker, and the service manual must list the LK03XL as an option. The reward is 52.5Wh versus 41.04Wh, about 28% more runtime.
How do I know if I have an HT03XL or HW03XL battery?
Read the white spare number sticker: L11119-855 identifies the HT03XL, L97300-005 the HW03XL. Without the sticker, check the cable exit. The HT03XL exits from the side edge and shipped in 2018โ2021 Pavilions. The HW03XL exits from the face and shipped in 2021+ Pavilion 15-eg and 17-cn models.
What is the difference between HT03XL and LK03XL?
Capacity and fit. The HT03XL holds 41.04Wh and fits 2018โ2021 Pavilion 14/15/17 laptops. The LK03XL holds 52.5Wh and fits Pavilion x360 15 and Envy x360 15 convertibles. Both run 11.55V, but the LK03XL is roughly 4.3mm thicker and only drops into bays with room for the taller cell stack.
Which battery fits my HP Pavilion 15?
It depends on the generation. A 2018โ2021 Pavilion 15 (15-cs, 15-da, 15-dw) takes the HT03XL. A 2021+ Pavilion 15-eg takes the HW03XL. A Pavilion x360 15 takes the LK03XL. Read the code on your current pack or the white spare number sticker โ never order by "Pavilion 15" alone.
How much longer does a 52.5Wh battery last than a 41Wh battery?
Roughly 28% longer. The 52.5Wh LK03XL stores 11.46Wh more than the 41.04Wh packs, and runtime scales close to capacity on light workloads. On a Pavilion 15 doing browsing and documents, that works out to about one extra hour per charge.
References & Sources
- HP PartSurfer โ Official HP parts database for verifying battery codes and spare numbers by laptop serial number
- HP Official Support โ Pavilion service manuals listing approved battery options per model
Matched your pack?
Browse HP Pavilion batteries by model code, with the HW03XL and LK03XL in stock.
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