Different Voltage and Amperage on laptop charger

maccer666

Hi i have a laptop here and the charger is dead,on the laptop it says the charger should be 20v 3.25a

I have a spare charger that will fit and have teated it and it works but the rating on it are 19V 6.32A.

My question is will i damage the laptop if i use this on a regular basis would i be better to try and source one with the same ratings.

mawk

The amps don't matter so much here but the voltage should be close. I presume the laptop battery is about 15v though so the extra 5v is probably to ensure top charge. I couldn't say 100%, but 19v shouldn't do you any harm. Just keep an eye on it for the first charge or two to make sure the charger/battery aren't getting crazy hot

Kinetic^

There's a good chance you'll blow capacitors on the main board with too much voltage.

maccer666

mawk wrote: »

The amps don't matter so much here but the voltage should be close. I presume the laptop battery is about 15v though so the extra 5v is probably to ensure top charge. I couldn't say 100%, but 19v shouldn't do you any harm. Just keep an eye on it for the first charge or two to make sure the charger/battery aren't getting crazy hot

ok thanks for that, ill try that but hopefully ill get a more conclusive answer from someone on here,last thing i want is to fry the board

maccer666

but ill be using less voltage and more amperage,is there still a danger in this?

mawk

You won't fry a capacitor, but by using a lower voltage you might blow a fuse by drawing extra current to compensate

quaalude

mawk wrote: »

The amps don't matter so much here but the voltage should be close. I presume the laptop battery is about 15v though so the extra 5v is probably to ensure top charge. I couldn't say 100%, but 19v shouldn't do you any harm. Just keep an eye on it for the first charge or two to make sure the charger/battery aren't getting crazy hot

I agree with mawk - 19V shouldn't do any harm with a laptop requiring 20V.
The voltage these adaptors put is usually only approximate (can vary up and down a little from, in your case, 19V), and the device usually also has some tolerance for this.

mawk

Aye, the original charger probably varies by more than a volt due to load when when the laptop battery is either charged or flat anyway

maccer666

ok great thanks for the info, so to some up i should be fine once i keep an eye on overheating from both the charger and battery

maccer666

ok great thanks for the info, so to some up i should be fine once i keep an eye on overheating from both the charger and battery