Is it bad to use a different charger for your laptop?

The short answer is; No. You should never intentionally use another laptop’s charger on your laptop. Plugging a different charger that isn’t meant for your specific model will not lead to anything good. In fact, it may immediately, if not eventually, fry your battery and you will have to get a new one.

Can I use a different AC adapter?

As long as the voltage is the same on the adapter and on the device (also, I have 9V DC and 9V AC adapters, do not mix these up) and be sure the current required is less than the amount that the adapter can source otherwise you risk overloading the power supply.

Can I use a different wattage power supply for my laptop?

Yes, Your laptop has been designed to draw up to a certain amount of power when running at full power. This means that you can quite safely use a charger with a higher wattage (or amps) rating as the laptop will only ever draw the amount of power required at the time.

Can I use a 5V 3a charger with a 5V 1a device?

Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.

Can I use a 45w charger instead of a 65w charger for my HP laptop?

As long as it is the same voltage and connector type you can use a higher watt adapter. It will charge the battery a bit faster but other than and the size of the brick you will see no difference.

Can I use a 20v charger on a 19.5 V laptop?

It’s best to use charger of same specification and model. 20v can be used for 19v as long as the current rating of 20v is the same or higher but only temporarily. Best to charge the battery and the then unplug and run the laptop, notebook etc on their batteries themselves to ensure the correct input to the circuitory.

How do I know which AC adapter is compatible?

The general rule is to match the V and equal or beat the mAh, so if you are choosing an AC adapter to make sure you check the following, The adapter output V matches the rated input V of the device. The adapter output is greater or equal to the devices rated mAh or A.

Can I use 65W AC adapter instead of 45w?

What happens if you use the wrong wattage charger to charge your laptop?

Under wattage, charger will limit the current to its capacity to prevent overheating that will result show charging of the laptop. In worst case, when laptop is ON, charger is unable to supply enough required current i.e. to run the OS and charge the battery simultaneously.

Do amps matter on laptop chargers?

Input, output, doesn’t really matter as long as you are comparing same side thing on both chargers. Since you need charger of certain voltage for the laptop to work, your output voltage is set. If you use charger with less than specified Current rating (Amps) you end up with less than specified power to laptop.

Will charging faster damage the battery?

The bottom line is, fast charging won’t impact your battery life substantially. But the physics behind the technology means you shouldn’t expect the battery to last longer than using a conventional “slow” charging brick. But that’s just a single factor.