Quick Answer
Most ASUS Chromebooks charge with a 45W or 65W USB-C Power Delivery charger. If a replacement charger won’t charge the device at all, confirm it supports USB-PD (not just a USB-C plug shape) and check the port for debris, since ASUS’s compact chassis designs pack the port tightly against the board.
Causes
Charging issues on ASUS Chromebooks usually come from a replacement charger that has a USB-C connector but doesn’t actually support USB Power Delivery, a cable rated for charging only and not full wattage, a port affected by dust given ASUS’s tightly packed chassis, or heavy sustained use (like Android gaming) outpacing what a lower-wattage charger can supply.
Fix Steps
Step 1: Confirm the charger supports USB-PD
A USB-C plug alone doesn’t guarantee compatibility. Check the charger’s label or packaging for “USB Power Delivery” or “PD” specifically, which is required for proper Chromebook charging.
Step 2: Check the cable, not just the charger
Some USB-C cables are rated for lower wattages than the charger itself supports. Use the cable that came with the charger or one explicitly rated for 60W or 100W.
Step 3: Inspect the port for debris
ASUS’s compact Chromebook designs, especially fanless models, pack components tightly. Check the port with a flashlight for lint and clear it gently with compressed air.
Step 4: Reduce load if charging slows during heavy use
If overheating and slow charging happen together during Android gaming, see our guide on ASUS Chromebook overheating, since heat can affect charging efficiency under sustained load.
Step 5: Try the original ASUS charger
If you’ve been using a third-party replacement, test with the original ASUS charger if you still have it, since generic chargers occasionally fail to negotiate the correct power profile.
Step 6: Test a different port
If your ASUS model has two USB-C ports, try the other one to see whether the issue is isolated to a single port.
Still Not Fixed?
If a confirmed USB-PD charger and cable still won’t charge the device from either port, the charging port itself may be damaged. See our full charging diagnostic guide for further steps, including when to consider a port repair.
FAQ
Can I use a phone charger on my ASUS Chromebook?
Yes, if it’s USB-C and supports USB-PD, though it will likely charge more slowly than the Chromebook’s rated wattage since phone chargers are often lower power.
Why does my ASUS Chromebook charge slower during gaming?
Heavy sustained workloads like Android gaming can draw more power than a lower-wattage charger supplies, effectively slowing or pausing charging while in active use.
Is it safe to use a higher-wattage charger than ASUS recommends?
Yes, the Chromebook only draws what it needs, so extra available wattage from a higher-rated charger is simply unused headroom, not a risk.
