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Rectangular black lithium-ion laptop battery with three cells and label showing 11.55V 42W

HP

HP 11.55V 42W 3-Cell Laptop Battery 920046-421 920046-541 920046-855 920070-421 HSTNN-UB7J

SKU CH-SS9E-BE1Z3

11.55 V lithium-ion 3-cell battery rated at 42 W, fully compatible with HP 920046-421, 920046-541, 920046-855 and 920070-421 part numbers

  • CompatibilityCompatible with HP 920046-421 920046-541 920046-855 920070-4
  • Battery TypeLithium-Ion
  • Lithium-Ion technology provides reliable portable power
  • 55 V voltage matches original HP specifications
  • 42 W capacity extends laptop runtime
  • Three premium cells deliver consistent performance
  • CE and RoHS certified for safety compliance

HP 11.55V 42W 3-Cell Replacement Battery

This lithium-ion battery replaces HP part numbers 920046-421, 920046-541, 920046-855 and 920070-421. It supplies 11.55 volts and 42 watt-hours from three premium cells. It is intended for owners of compatible HP laptops who need a new power source.

Voltage and Capacity Limits

The pack delivers a fixed 11.55 V output; it will not operate laptops that require a different voltage. Capacity is 42 Wh, so runtime depends entirely on the notebook's power draw. The three-cell design defines the physical size and energy ceiling.

Straightforward Swap with Fit Risks

Installation typically requires removing the bottom case screws and disconnecting the old pack. The main difficulty is confirming the exact part match; the listed numbers must correspond to the original battery label. A mismatched part will not seat or connect correctly.

Highlights

  • Lithium-Ion technology provides reliable portable power
  • 55 V voltage matches original HP specifications
  • 42 W capacity extends laptop runtime
  • Three premium cells deliver consistent performance
  • CE and RoHS certified for safety compliance

Specifications

CompatibilityCompatible with HP 920046-421 920046-541 920046-855 920070-421 HSTNN-UB7J
Battery TypeLithium-Ion

Questions about this item

Should I pick the 42 W version or a different capacity for my HP laptop?

This replacement is only offered as a 42 Wh, 3-cell lithium-ion pack, so there is no alternative capacity to choose from.

What does the 11.55 V rating mean when the battery is installed?

The 11.55 V output matches the original HP specification, so the laptop's power management sees the correct voltage and regulates charge cycles normally.

Does the pack use a standard interface that could limit performance?

It connects through the proprietary HP battery connector used by the listed part numbers, so no industry-standard interface caps its output.

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