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Small black rectangular power brick with barrel connector and two-pin mains plug

DELL SK90A195231 45W AC Adapter 19.5V 2.31A 3.0mm/4.5mm

SKU CH-2KS6-1WDAT

A 45W AC adapter delivering 19.5V at 2.31A with a 3.0mm by 4.5mm connector for compatible HP laptops

  • Battery voltage rating20 V
  • Power adapter voltage20 V
  • Power adapter current11.8A
  • Power adapter wattage85 W
  • Compatible withPC
  • Key featuresProprietary, Corded Electric, 0, type a 2pin na, 19.5 V, 2.3
  • Delivers 45 W output for efficient laptop charging
  • Accepts 100–240 V AC input for worldwide use
  • Connector fits 3.0 mm inner and 4.5 mm outer diameter ports
  • Compatible with numerous HP Stream, Pavilion, Chromebook and Spectre models
  • Weighs only 0.272 kg for easy portability

Dell 45W AC Adapter 19.5V 2.31A

This Dell SK90A195231 adapter delivers 45 watts at 19.5 volts and 2.31 amps for compatible laptops. It accepts AC 100-240V input at 50-60Hz for worldwide use. The unit weighs 0.272 kilograms and uses a proprietary corded electric design. It serves as a replacement power supply for specific HP notebook models.

Connector fit decides compatibility

Buyers must verify the 3.0mm inner and 4.5mm outer barrel dimensions match the laptop port exactly. The adapter supports numerous HP Stream, Pavilion, Chromebook, Spectre and ZBook series models listed in the compatibility data. It will not work for devices requiring a different voltage, current or connector size. Users needing higher wattage or a USB-C power delivery interface should look at other options.

Output specification is 19.5V 2.31A 45W

The critical specification is the 19.5 volt 2.31 amp output providing 45 watts of power. This exact electrical rating must match the original charger requirement for safe operation. The 3.0mm by 4.5mm barrel connector is the physical interface that must fit the device charging port. Confirm both values before purchase to ensure correct functionality.

How it compares

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

Price $20.99
Cheaper than about 70% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameDELL
Model nameSK90A195231
Part numberSK90A195231
Power
Battery voltage rating20 V
Power adapter voltage20 V
Power adapter current11.8A
Power adapter wattage85 W
Size & build
Product weight0.272 kg
Compatibility
Compatible withPC

Questions about this item

How do I install the 3.0mm/4.5mm connector and what step do people get wrong?

Align the 3.0mm interior and 4.5mm exterior diameters with the laptop's DC jack, then push straight in until it seats firmly. The common error is forcing the plug at an angle, which bends the centre pin.

What maintenance or replacement will this 45W adapter need later?

The detachable AC cord can be swapped if the 2-pin plug or cable sheath wears out. The sealed brick itself has no user-serviceable parts; replace the whole unit if output drops below 19.5V or 2.31A.

What limit shows up first under sustained use of this 19.5V 2.31A charger?

The 45W thermal ceiling is reached first. Continuous full-load operation raises the case temperature until internal protection throttles output to stay within safe limits.

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