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HP HSTNN-LA40 45W AC adapter brick with detachable power cord

HP

HP HSTNN-LA40 45W AC Adapter for Chromebook 14-ak039wm 14-ak040wm with Power Cord

SKU CH-Y5MF-E8DFQ MPN HSTNN-LA40

45W AC adapter powers HP Chromebook 14-ak039wm and 14-ak040wm models, includes power cord

  • Genuine HP charger powers your Chromebook 14-ak039wm 14-ak040wm
  • 45W output at 19.5V 2.31A keeps the battery charged
  • Wide 100-240V input with 50-60Hz frequency works worldwide
  • Includes power cord so you can plug in immediately
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating

Genuine 45W HP Chromebook Adapter

This genuine HP HSTNN-LA40 AC adapter supplies 45W of power for compatible Chromebook models 14-ak039wm and 14-ak040wm. It includes a detachable power cord for immediate use. The unit accepts a wide 100-240V input range suitable for international travel.

Thermal Behaviour and Power Draw

The adapter operates on a 100-240V~1.1A 50-60Hz input and delivers a regulated 19.5V 2.31A output. Built-in safeguards protect against incorrect voltage, short circuit, and internal overheating during normal operation. No active cooling fan is present, ensuring silent performance.

Sustained Load Characteristics

Under continuous load the adapter maintains a steady 19.5V 2.31A output within its 45W rating. The internal overheating protection activates if thermal limits are exceeded during prolonged use. It is not intended for devices requiring higher wattage or different voltage specifications.

Highlights

  • Genuine HP charger powers your Chromebook 14-ak039wm 14-ak040wm
  • 45W output at 19.5V 2.31A keeps the battery charged
  • Wide 100-240V input with 50-60Hz frequency works worldwide
  • Includes power cord so you can plug in immediately
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 45W adapter to the Chromebook 14-ak039wm and what step is often missed?

Plug the barrel connector firmly into the laptop's DC-in jack until it seats, then attach the IEC C7 power cord to the brick and a 100-240V 50-60Hz outlet; the step often missed is verifying the cord clicks into the adapter before powering on.

What part of the HSTNN-LA40 kit will need replacement first under daily use?

The detachable IEC C7 power cord typically wears at the strain relief before the sealed 19.5V 2.31A brick; keep a spare cord handy for quick swaps.

What limit appears first when the 45W adapter runs continuously at full load?

Internal overheating protection (IO) triggers before voltage or current limits, cycling output until the 19.5V 2.31A brick cools below its thermal threshold.

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