Lauren HollandBy Lauren Holland

Updated November 2026

To find the right charger for a Hewlett Packard laptop, look at the output voltage and amperage printed on your current adapter or the bottom of the laptop, then match or exceed the wattage and use the exact connector type your model needs. A replacement must supply the same voltage, enough wattage for your machine, and a plug that fits the laptop’s charging port. Never guess on voltage, because a mismatch can damage the battery or the motherboard.

Before you buy anything, confirm what your laptop actually uses. HP laptops have shipped with barrel plugs, slim proprietary connectors, and USB-C Power Delivery, and the charger that works on one model can be unsafe on another. Our guide HP Hewlett Packard Laptop Charger: How to Identify, Test and Replace Yours walks through reading the label and testing a suspect adapter.

Shopping for one? See our guide: 9 Best HP Laptops with Charger Options for Everyday Use (2026).

Why Your HP Laptop Charger Needs to Match Exactly

A laptop charger is not a universal part. It converts wall power into a specific voltage and current, and the laptop’s charging circuit expects that output. If the voltage is too low, the laptop may refuse to charge or show a “not charging” warning. If the voltage is too high, the battery management circuit or the charging port can be damaged. Wattage matters too: a charger that delivers less power than the laptop needs may charge slowly or only charge while the laptop is idle.

Connector shape is the other common failure point. Barrel plugs come in many diameters and center-pin polarities, and HP sometimes uses a slim pin connector on compact models. A plug that fits loosely can cause intermittent charging, and a forced fit can crack the port’s solder joints.

The Factors That Determine a Compatible Charger

When you check compatibility, you are comparing four specifications. Each one should line up with what the laptop requires.

  • Output voltage: This must match the laptop’s rated input. HP laptops commonly use 19.5V, but other voltages appear on some models, so read the number instead of assuming.
  • Output current (amps) and wattage: Wattage equals voltage times amps. A replacement should meet or exceed the original wattage. Higher wattage is generally safe because the laptop draws only what it needs, but the voltage must be identical.
  • Connector type and size: Barrel plugs are described by outer and inner diameter, such as 4.5mm by 3.0mm. Slim proprietary connectors need the exact HP part style.
  • Polarity: Barrel plugs can have the positive or negative pole on the center pin. The reversed version can damage the laptop.

Your laptop’s bottom label, the original adapter’s label, or the model’s specification page will list these values. Look for the phrase “Input” on the laptop and “Output” on the charger. Those two lines are the ones you compare.

How to Tell If the Charger or the Laptop Is Failing

Many charging complaints are caused by the adapter rather than the laptop. Frayed cables, a loose connector at the brick, or a damaged port on the laptop can all mimic a dead charger. Start by testing the simplest variable.

  1. Check the indicator light on the adapter. If it does not light when plugged into a working outlet, the adapter is likely the problem.
  2. Wiggle the cable at the brick and at the laptop end while watching the charging light. Flickering points to a broken conductor.
  3. Try a different outlet or power strip to rule out the wall supply.
  4. If you have a known-good compatible charger, swap it in. If the laptop charges with it, the original adapter is at fault.
  5. Inspect the laptop’s charging port for debris, bent pins, or looseness. Lint and dust can be cleared gently with a wooden or plastic tool and compressed air.

What to Do If You Need a Replacement

Buy from a source that lists the voltage, amperage, connector size, and polarity clearly. Avoid listings that say only “compatible with HP” without those specifications. Original HP adapters are the safest choice because they match the laptop exactly, though third-party chargers that meet the same specs are widely available. Pay attention to the certification markings on the adapter, such as UL or CE, since they indicate the product has been tested for electrical safety.

If your laptop uses USB-C charging instead of a barrel plug, you have more flexibility, but the charger still needs Power Delivery support and enough wattage. Our article Understanding USB-C Charger Wattage and Power Delivery explains how to read those ratings.

Practical Tips Before You Buy or Replace

  • Photograph the label on your current charger so you have the exact specs on hand while shopping.
  • Match voltage first, then choose wattage equal to or higher than the original.
  • Measure the plug if you do not have a label, using calipers if possible, and compare against the connector size listed for your model.
  • Do not use a charger with a cracked casing, exposed wires, or a plug that gets hot during use.
  • If the laptop has battery issues along with charging problems, check the battery health in the laptop’s system settings before assuming the charger is at fault.

What We’d Use

For most HP models that use a standard barrel connector, an original HP replacement adapter is the most reliable choice because it matches the specifications exactly. View on Amazon

If you want a compact spare for travel, a USB-C laptop charger with Power Delivery can work on compatible models, as long as the wattage meets the laptop’s requirement. View on Amazon

For a model-specific replacement that lists the exact connector and output, a universal laptop charger with interchangeable tips is useful when you need to match the plug size manually. View on Amazon

Can I use any laptop charger on my HP?

Only if the voltage matches, the wattage is equal to or higher, and the connector and polarity fit. A mismatched voltage can damage the laptop, so do not assume universal compatibility.

Does a higher wattage charger harm my HP laptop?

Generally no, because the laptop draws only the power it needs. The voltage must still match exactly, since voltage determines whether the laptop is safe to connect.

Why does my HP laptop say not charging even with the adapter plugged in?

The cause is often a loose connector, a failed adapter, or a damaged charging port. Testing with a known-good charger usually reveals which part is faulty.

How do I find my HP model’s charger specs?

Check the label on the bottom of the laptop and the label on the original adapter. The model number and the input and output ratings are printed there. If the labels are unreadable, the manufacturer’s support pages list specifications by model.

If you notice burning smells, smoke, swelling in the battery, or a charger that gets very hot, stop using it and consult a qualified electronics repair professional or the manufacturer’s support team.

Ready to choose one?

Lauren Holland

About Lauren Holland

Lauren Holland is part of our editorial team and reviews and edits our consumer tech how-to & troubleshooting guides, checking product details against manufacturer specifications and owner feedback.