What you can use instead of your Chromebook's charger

You can charge most modern Chromebooks with any USB-C power adapter that delivers enough wattage — you do not need the original charger. A phone charger, tablet charger, laptop charger, or even a portable battery pack with USB-C output will work, as long as it meets your Chromebook's power requirements. The catch is that some chargers are too weak and will charge very slowly or not at all while your Chromebook is in use.

The safest approach is to match or exceed the wattage of your original charger. Most Chromebooks need between 45 and 65 watts; some larger models need up to 100 watts. You can find your Chromebook's requirement printed on the original charger itself, or in your device's settings under "About" or "Device Information." If you use a charger with lower wattage, your Chromebook will charge slowly or stay at the same battery level while you work.

Older Chromebooks with barrel-shaped charging ports (not USB-C) are harder to replace — you will need a charger made specifically for that model. Check your device's manual or contact the manufacturer to find a compatible option.

Key Takeaways

  • Any USB-C power adapter will charge a modern Chromebook, but it must deliver enough wattage to charge at normal speed.
  • Your Chromebook's original charger shows the wattage requirement on its label — match or exceed that number when choosing a replacement.
  • Phone chargers (typically 18–30 watts) will charge your Chromebook slowly or not at all during use, but work fine for overnight charging.
  • Portable USB-C battery packs work for emergency charging but drain faster than wall chargers because they have lower wattage.
  • Older Chromebooks with barrel-shaped ports need model-specific chargers and cannot use standard USB-C adapters.

Using a phone or tablet charger

A phone or tablet charger is the most common replacement because most people have one nearby. An iPhone charger (20 watts), Samsung phone charger (25 watts), or iPad charger (20–30 watts) will work with your Chromebook's USB-C port. The trade-off is speed: these chargers are designed for smaller devices and deliver much less power than your Chromebook needs.

If your Chromebook is off or in sleep mode, a phone charger will charge it, though slowly — expect 8 to 12 hours for a full charge. If you are using your Chromebook while it charges, a phone charger will not keep up with the power drain. Your battery will stay flat or drop slowly, even though it is plugged in. This is not dangerous; it just means you cannot work and charge at the same time.

For overnight charging or emergency top-ups, a phone charger is fine. For daily use, you need something stronger.

Using a laptop or tablet charger with higher wattage

A laptop charger from another brand — such as a Dell, Lenovo, or HP charger with USB-C output — will charge your Chromebook at full speed if it delivers 45 watts or more. Many modern laptops use USB-C charging, so you may already own a compatible charger. Check the wattage label on the charger itself.

iPad Pro chargers (20–35 watts) fall into a middle ground: they charge faster than phone chargers but slower than a full laptop charger. A 35-watt iPad charger will charge your Chromebook while you use it, but slowly. A 45-watt or higher charger will charge at normal speed even under load.

If you own multiple devices, a high-wattage USB-C charger (65 watts or more) is worth buying because it will charge your Chromebook, phone, tablet, and other USB-C devices. Look for chargers labeled 65W, 100W, or higher on retail sites or in electronics stores.

Charging with a portable battery pack

A USB-C portable battery pack (also called a power bank) can charge your Chromebook in an emergency, though it will not fully charge a dead battery. Most portable packs hold 10,000 to 30,000 milliamp-hours (mAh), which translates to roughly 25 to 75 percent of a Chromebook's battery in a single charge.

The speed depends on the battery pack's wattage output. A 30-watt pack will charge slowly; a 65-watt pack will charge much faster. Check the pack's specifications before buying — look for "USB-C output" and wattage listed in watts (W), not just capacity in mAh.

Portable packs are useful for travel or situations where you cannot reach a wall outlet, but they are not a permanent solution. They drain while charging your Chromebook, so you will need to recharge the pack itself afterward.

What to avoid when charging without the original charger

Do not use a charger with a different port type unless you have an adapter. A micro-USB charger will not fit a USB-C port, and forcing it can damage both the charger and your Chromebook. If you need an adapter, buy a USB-C to micro-USB adapter from a reputable electronics retailer.

Avoid chargers with extremely low wattage (under 18 watts) for regular use. They may charge your Chromebook so slowly that the battery drains faster than it fills while you work, which is frustrating and wastes time.

Do not assume all USB-C chargers are the same. A USB-C charger designed for a phone will not damage your Chromebook, but it will charge it slowly. Always check the wattage before buying a replacement charger.

Finding your Chromebook's power requirements

The easiest way to find your charger's wattage is to look at the original charger itself. The label on the back or side lists the output in watts — it will say something like "65W" or "45W USB-C." Write this number down or take a photo so you have it when shopping for a replacement.

If you no longer have the original charger, check your Chromebook's settings. Open the Settings app, go to "About," and look for "Power" or "Battery" information. Some Chromebooks display the charger wattage here. You can also search online for your exact Chromebook model number plus "charger specifications" — manufacturer websites usually list the power requirement.

As a general rule, if you are unsure, a 65-watt USB-C charger will work with almost any Chromebook and is a safe choice for a replacement.

Frequently Asked Questions

Can I use a USB-C charger from a different brand?

Yes, as long as it has USB-C output and delivers enough wattage. A Dell, Lenovo, or any other brand's USB-C charger will work with your Chromebook. The brand does not matter — only the port type and wattage do.

Will a weak charger damage my Chromebook?

No. A low-wattage charger will not harm your Chromebook, but it will charge slowly or not at all while you use the device. It is safe to use, just inconvenient.

Can I charge my Chromebook with a phone charger overnight?

Yes. A phone charger will fully charge your Chromebook if it is off or in sleep mode, though it will take 8 to 12 hours. This is safe and works fine for occasional use.

What if my Chromebook has an old barrel-shaped charging port?

Older Chromebooks with barrel ports cannot use USB-C chargers. You need a charger made for your specific model. Check your device's manual or the manufacturer's website to find a compatible replacement charger.

Is it safe to leave my Chromebook plugged in overnight?

Yes. Modern Chromebooks stop charging once the battery reaches 100 percent, so leaving it plugged in overnight will not damage the battery. Overcharging protection is built in.