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Rectangular black lithium-ion laptop battery with four cells and screwdrivers

FOCUSTEC

FOCUSTEC MB04XL 55.67Wh 15.4V 4-cell laptop battery

SKU CH-G525-Q14W1 MPN MB04XL

A 55.67 Wh lithium-ion battery for HP Envy x360 convertible laptops, supplied with screwdrivers for straightforward replacement

  • Battery TypeLithium-Ion
  • 67 Wh capacity powers long sessions away from the mains
  • 4 V lithium-ion chemistry gives stable voltage under load
  • Four-cell design keeps weight to 0.69 lb for easy portability
  • Replaces HP part numbers 844204-850 and 843538-541 for direct fit
  • Includes screwdrivers so you can swap the battery in minutes

Replacement battery for HP Envy x360 convertible PCs

This 55.67Wh lithium-ion pack replaces the original MB04XL unit in HP Envy x360 m6-aq and 15-aq series convertibles. It matches the 15.4V, four-cell specification used by part numbers 844204-850, 843538-541 and HSTNN-UB6X. The package includes a replacement battery and screwdrivers for installation. Buyers needing a higher-capacity pack or a different voltage will not find it here.

Thermals and power draw in normal use

Grade A lithium-ion cells deliver fast charging and low power consumption during everyday workloads. The 15.4V nominal voltage keeps thermal output consistent with the factory design. No active cooling is required beyond the laptop's existing chassis ventilation. Users who need detailed thermal curves or acoustic measurements will not find that data in the supplied specifications.

Upgrade context and when the jump is worth it

This battery restores original runtime for models such as 15-aq273cl, 15-aq166nr and m6-aq105dx when the factory cell has degraded. It is a direct swap for part numbers MB04XL, MBO4XL, TPN-W119 and TPN-W120. The improvement is worthwhile when the existing pack no longer holds a useful charge. Buyers looking for extended-life chemistries or increased capacity beyond 55.67Wh will need a different solution.

Highlights

  • 67 Wh capacity powers long sessions away from the mains
  • 4 V lithium-ion chemistry gives stable voltage under load
  • Four-cell design keeps weight to 0.69 lb for easy portability
  • Replaces HP part numbers 844204-850 and 843538-541 for direct fit
  • Includes screwdrivers so you can swap the battery in minutes

Specifications

Battery TypeLithium-Ion

Questions about this item

How do I install the MB04XL battery in my HP Envy x360 and which step is often missed?

Remove the bottom case screws, disconnect the old battery cable, fit the new 4-cell 15.4V pack, reconnect the cable, then replace the case screws — people often forget to reconnect the battery cable before closing the chassis.

What maintenance or replacement will the MB04XL lithium-ion battery need later?

The 55.67Wh lithium-ion pack will gradually lose capacity over charge cycles; plan to replace it once run time drops below your needs, typically after several hundred full cycles.

What limit appears first during sustained use of the 15.4V 4-cell battery?

The 55.67Wh capacity sets the runtime ceiling; under continuous load the pack will deplete before any thermal or voltage limit is reached.

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