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Black rectangular lithium-ion laptop battery with connector on one end

KingSener

KingSener MB04XL 15.4V 55.67WH laptop battery

SKU CH-6W5Y-W41KV MPN MB04XL

Replacement lithium-ion battery for HP Envy X360 M6 and 15-inch convertible models, 15.4V 55.67Wh

  • Battery typeLithium-Ion
  • Battery voltage rating15.4 V
  • Battery capacity3,615 mAh/55.67WH
  • Product colorBlack
  • Compatible withFor HP Envy X360 M6-AQ103DX
  • Delivers 55.67 Wh for extended runtime
  • 4 V output matches original spec
  • 3615 mAh capacity supports all-day use
  • Lithium-Ion cells built for reliable cycles
  • Replaces HSTNN-UB6X and MB04XL part numbers

Replacement Battery for HP Envy X360 M6 Series

This lithium-ion replacement battery delivers 15.4 volts and 55.67 watt-hours of capacity. It matches part numbers HSTNN-UB6X, MB04XL, TPN-W119 and several other OEM codes. The unit is designed for the HP Envy X360 M6 convertible PC series and the 15-inch Envy X360 15-AQ models. Buyers needing a different voltage or form factor cannot use this pack.

Sustained Output at 15.4 Volts

The 3615 milliampere-hour cell rating supports continuous discharge at the rated voltage during typical mobile workloads. Internal lithium-ion chemistry maintains stable output without the sharp voltage drop seen in aged original packs. The black casing fits the existing battery bay without modification. Systems requiring hot-swap capability or external charging contacts are not supported by this design.

Standard Lithium-Ion Interface Limits

The pack connects through the laptop's native battery connector using the standard pinout for this model family. No firmware handshake beyond the stock battery identification is required for the system to report capacity correctly. The 15.4 volt nominal rating aligns with the original charging circuit limits. Users expecting smart-battery data such as cycle count or temperature telemetry beyond basic capacity reporting will not find those features here.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $36.99
Pricier than about 66% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingsener
Model nameFor HP Envy X360 M6-AQ103DX
Part numberHSTNN-UB6X, MB04X
Product colorBlack
Power
Battery typeLithium-Ion
Battery voltage rating15.4 V
Battery capacity3,615 mAh/55.67WH
Compatibility
Compatible withFor HP Envy X360 M6-AQ103DX

Questions about this item

Does the 15.4V 55.67WH lithium-ion cell run hotter than the original battery during long sessions?

The replacement uses the same 15.4V 55.67WH lithium-ion chemistry as the factory pack, so thermal behaviour matches the original design.

My HP Envy x360 15-AQ155NR chassis uses the HSTNN-UB6X connector — does this pack include that exact plug?

Yes, the MB04XL ships with the HSTNN-UB6X connector that fits the 15-AQ155NR and every other model listed in the compatibility table.

Will the 3615mAh capacity work correctly with the Envy x360 M6-AQ103DX power-management firmware?

The 3615mAh / 55.67WH rating matches the OEM specification for the M6-AQ103DX, so the firmware reads charge state accurately.

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