We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular lithium polymer laptop battery with screwdrivers

FOCUSTEC

FOCUSTEC LK03XL 52.5Wh 11.55V 3-cell laptop battery

SKU CH-63DH-AT417 MPN LK03XL

A 52.5 Wh lithium-polymer replacement battery with 11.55 V output and built-in circuit protection for select HP Envy x360 convertible models

  • Battery TypeLithium-Ion
  • 5 Wh capacity supports longer unplugged sessions
  • 55 V lithium-polymer chemistry delivers stable power output
  • 3-cell design keeps weight low for portable use
  • Built-in circuit protection guards against overcharge and short circuits
  • Rated for up to 500 recharge cycles over battery life

Replacement Battery for HP Envy x360 Convertible

This 52.5Wh lithium-polymer pack operates at 11.55V across three cells and matches part numbers including LK03XL and L09281-855. It fits HP Envy x360 Convertible 15-BP, 15-BQ, 15-CN, 15M-BP, 15M-BQ, 15M-CP and 15M-CN series notebooks. The unit ships new with factory testing and grade A cells.

Bundled Screwdrivers Simplify Installation

The package includes a set of screwdrivers so you can open the chassis and swap the battery without sourcing tools separately. This reduces downtime and avoids the risk of using ill-fitting bits that could damage screw heads or the case.

Lithium-Polymer Chemistry and Cycle Life

The pack is rated for up to 500 recharge cycles before capacity drops noticeably, so runtime will gradually decline after extended use. Built-in circuit protection guards against overcharge, over-discharge and short circuits, but the chemistry still ages with time and temperature regardless of protection.

Highlights

  • 5 Wh capacity supports longer unplugged sessions
  • 55 V lithium-polymer chemistry delivers stable power output
  • 3-cell design keeps weight low for portable use
  • Built-in circuit protection guards against overcharge and short circuits
  • Rated for up to 500 recharge cycles over battery life

Specifications

Battery TypeLithium-Ion

Questions about this item

How many recharge cycles does the LK03XL battery support before it needs replacing?

The LK03XL is rated for up to 500 recharge cycles over its lifespan, after which capacity will have degraded enough to warrant a replacement.

What is the first limit reached when the 3-cell 52.5Wh pack runs under sustained load?

The 52.5Wh capacity is the limiting factor; once the stored energy is depleted the battery must be recharged before the laptop can continue running.

Does the 11.55V lithium-polymer battery generate noticeable heat or noise during all-day use?

The battery itself has no moving parts and produces no noise; any warmth comes from normal internal resistance during charge or discharge and is managed by the laptop's own thermal system.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.