SR03XL L08855-855 Battery Replacement for HP Pavilion 15-CX - 52.5Wh

In this review of the SR03XL L08855-855 replacement battery, the bottom line is straightforward: this replacement is for owners of HP Pavilion and Envy x360 15-series laptops who need a like-for-like Li-ion pack with clear installation guidance and a solid expected life. It is best for users who want a direct swap for the original SR03XL or SR04XL battery model and value a battery that ships with matching installation tools and instructions. For those seeking the absolute longest runtime or manufacturer warranty, alternatives from the laptop maker may still be preferable.

Key Features

• Model and compatibility: The SR03XL is designed to replace SR03XL, SR04XL and related HP part numbers so it fits many Pavilion 15-cx and Envy x360 15 models without modification.
• Capacity: At 52.5Wh (4550mAh) the pack provides the same nominal energy as the originals, making it a straightforward replacement for users tracking comparable on-battery runtime.
• Voltage and chemistry: With an 11.55V Li-ion design the battery matches the electrical requirements of compatible HP notebooks, reducing the risk of incompatibility.
• Included tools and instructions: The package includes a set of matching installation tools and instructions, which simplifies swapping the battery for users comfortable with a little disassembly.
• Safety and quality checks: The manufacturer states CE, FCC, ROHS and UL standards and built-in circuit protection for stable operation and basic safety assurance.

Who It's For

This replacement is ideal for owners of HP Pavilion 15-cx series, Pavilion Gaming 15-cx, and Envy x360 15-cn laptops that need a direct replacement for the SR03XL/SR04XL part numbers. It suits home and office users who are comfortable performing a battery swap using the supplied tools and who want similar runtime to the original pack.

It is less suitable for users who require extended runtime beyond the original specification or who need warranty-level service from the laptop manufacturer. Also, if a laptop shows persistent charging faults, a battery swap alone may not resolve underlying power or motherboard issues.

Pros & Cons

Pros

• Easy installation thanks to included tools and clear instructions, which customers consistently praise.
• Battery quality and compatibility are strong, matching multiple OEM part numbers for a straightforward replacement.
• Built-in circuit protection and stated certifications offer reasonable safety confidence for daily use.

Cons

• Battery life reports are mixed; some users see good charge retention while others encounter charging problems, so results can vary by unit or laptop condition.
• Replacement does not extend warranty coverage from the original laptop manufacturer, which may matter to some buyers.

Specifications

Battery Model	SR03XL
Voltage	11.55V
Capacity	52.5Wh / 4550mAh
Chemistry	Li-ion
Included in package	1x SR03XL battery, installation tools, instructions
Compatible part numbers	SR03XL, SR04XL, L08855-855 and related HP part numbers
Certifications	CE, FCC, ROHS, UL (manufacturer stated)

Our Verdict

The SR03XL L08855-855 is a practical, value-minded replacement for users with compatible HP Pavilion and Envy x360 15-series laptops who need a direct swap and appreciate included tools and instructions. It delivers matching voltage and capacity with safety features and reasonable longevity, but prospective buyers should accept that some units can show inconsistent charging behavior and that this is not a manufacturer-backed OEM warranty replacement.

Frequently Asked Questions

Will this battery fit my Pavilion 15-cx laptop?
If your laptop uses the SR03XL or listed compatible part numbers, this battery is designed to fit those Pavilion 15-cx and many Envy x360 15 models.

How many charge cycles can I expect?
The manufacturer states up to 500 recharge cycles over the battery life, which is typical for modern Li-ion laptop packs.

What if the battery does not charge?
Some customers report charging problems; check connections, follow the included instructions, and contact the seller support if issues persist for troubleshooting and replacement options.