What you can use instead of the original charger

A Chromebook charges through a USB-C port on almost every model made since 2015. If you have lost or damaged your charger, you can use any USB-C power adapter rated for at least 45 watts — a phone charger, tablet charger, laptop charger from another brand, or a universal USB-C power supply. The Chromebook will charge slower with a lower-wattage adapter, but it will still work.

The key is matching the connector type and ensuring the wattage is sufficient. Most Chromebooks need between 45 and 65 watts to charge at full speed. A 30-watt charger will charge your Chromebook, just more slowly — useful if you are in a pinch but not ideal for daily use. A 100-watt charger is safe and will not damage the battery.

Check your Chromebook's model number (usually on the bottom of the device or in Settings under About Chromebook) and search for its original charger specifications online. This tells you the exact wattage your model expects. Many Chromebooks use 45-watt chargers, but some larger models use 65 watts.

Key Takeaways

  • Any USB-C power adapter rated 45 watts or higher will charge your Chromebook, even if it was not made for that model.
  • Phone and tablet chargers with USB-C ports will charge a Chromebook but may do so slowly if they are under 30 watts.
  • A charger rated higher than your Chromebook needs (such as 100 watts) is safe and will not harm the battery.
  • You can find your Chromebook's original charger wattage by searching your model number online or checking the Settings menu.

Where to find a replacement USB-C charger

USB-C chargers are sold at most electronics retailers, big-box stores, and online marketplaces. Look for chargers labeled as 45-watt or higher and confirm they have a USB-C output port. Brands like Anker, Belkin, and Dell sell universal USB-C chargers that work with Chromebooks and other devices.

If you already own a phone, tablet, or laptop charger with a USB-C port, test it first before buying a new one. Borrow a charger from a friend or family member to confirm it works with your Chromebook. This saves money and tells you what wattage you actually need.

Charging speed with different wattages

A 45-watt charger is the standard for most Chromebooks and will charge the battery in roughly 2 to 3 hours from empty. A 30-watt charger will take 4 to 5 hours. A 65-watt charger charges at the same speed as a 45-watt charger because the Chromebook only draws what it needs — the extra capacity does not speed things up.

If your Chromebook is in use while charging, it will charge more slowly regardless of the charger wattage. Closing programs and dimming the screen speeds up charging time. Turning the device off charges it fastest, though most people charge while using the Chromebook.

Using a power bank to charge your Chromebook

A USB-C power bank with at least 45 watts of output can charge a Chromebook, but most portable power banks are not powerful enough. Most phone power banks are 10 to 30 watts and will charge a Chromebook very slowly or not at all. You need a power bank specifically labeled as 45 watts or higher and with USB-C output.

Laptop-sized power banks exist and work well for this purpose, but they are expensive and heavy — often $100 or more. For occasional emergency charging, borrowing a wall charger is more practical than buying a high-wattage power bank.

Charging from a car or USB outlet

A car charger with USB-C output and 45 watts or higher will charge your Chromebook while you drive. These are sold at auto parts stores and online. Plug it into your car's 12-volt outlet (the cigarette lighter socket) and connect your Chromebook with a USB-C cable.

Some airports, coffee shops, and public spaces have USB outlets or USB-C outlets built into walls or furniture. These are usually low-wattage (5 to 15 watts) and will charge your Chromebook very slowly, but they work in a pinch. Always check that the outlet is labeled as safe for devices before plugging in.

What not to do when charging without the original charger

Do not use a charger with a different connector type, such as micro-USB or proprietary connectors. These will not fit your Chromebook's USB-C port and may damage the port if forced. Do not use a charger rated below 20 watts — it may not provide enough power and could cause the Chromebook to charge very slowly or not at all.

Do not leave a Chromebook plugged in continuously for weeks at a time. Modern Chromebooks have battery management built in, but extended charging can degrade the battery over months. Unplug the charger once the battery reaches 100 percent, or use a smart power strip that cuts power automatically.

Checking your Chromebook's charging port for damage

Before trying a new charger, inspect the USB-C port on your Chromebook for debris, bent pins, or corrosion. Use a flashlight and look inside the port. If you see lint or dust, use a wooden toothpick or plastic pick to gently remove it — never use metal, which can short the port.

If the port looks corroded (green or white discoloration inside) or the pins are visibly bent, the port may need professional repair. A damaged port may not charge even with the correct charger. Contact the manufacturer or a repair shop for options.

Frequently Asked Questions

Can I use my phone charger to charge my Chromebook?

Only if your phone charger has a USB-C port and is rated 45 watts or higher. Most phone chargers are 18 to 30 watts and will charge a Chromebook very slowly. Check your phone charger's wattage on the adapter itself or in the manual.

Will a higher-wattage charger damage my Chromebook battery?

No. A 100-watt charger is safe to use with a Chromebook that normally uses 45 watts. The Chromebook draws only the power it needs, so extra wattage does not cause damage. The charger will not overheat the battery.

How do I know what wattage my Chromebook needs?

Search your Chromebook's model number online — you can find it on the bottom of the device or in Settings under About Chromebook. The original charger specifications will list the wattage. Most Chromebooks use 45 watts, but some larger models use 65 watts.

Can I charge my Chromebook with a USB-A to USB-C cable?

No. The cable type does not matter — you need a USB-C power adapter (the wall plug). A USB-A to USB-C cable is just a cable and does not provide power on its own. The adapter must have USB-C output.

What if my Chromebook will not charge with a different charger?

The port may be damaged, or the charger may not be providing enough power. Try a different charger if you have access to one. If multiple chargers do not work, the USB-C port likely needs repair. Contact your Chromebook's manufacturer or a repair technician.