I have an ASUS laptop that says it needs a 65W charger, but I only have a 45W power brick. I'm wondering if it will still charge the battery when the laptop is turned off or not in use. The power brick outputs 2.37A, while my laptop requires 3.24A. Is it at least capable of charging?
3 Answers
I often use a lower wattage charger than what's recommended for my devices. For example, I've used a 25W charger on a 140W device, and while it does charge, it charges much slower, which is easier on the battery in the long run. However, note that my Dell laptop won't charge at all with anything less than 65W when it's in use, so it really depends on your laptop's design. If the laptop is turned off, you should be fine, but just don’t expect fast charging.
Exactly, the portability of a lower watt charger can be great for travel but charging will definitely be slower. It’s like using a phone charger for your laptop – it works overnight when powered off, but don’t expect it to keep up when you're using it.
Yes, as long as the output voltage matches, the 45W charger should still work for charging your laptop, albeit slower. If your laptop is completely off, it should be able to charge, but keep in mind that it might take longer than usual.