Wrong laptop universal charger?

Toggle sidebar Toggle sidebar
M

miguelfire

Honorable
Dec 25, 2012
12
0
10,510
Hi guys!

I just bought a universal charger for my old laptop.

On the back of my laptop is written 19V, 4,74A.

On the universal chargers handbook is written: 18-19V @ max.4200mA. Also it is written 90Watts on it.
Is this the right charger for my laptop? Because there shouldnt be enough Amperes for it right? I am currently writing on my computer with this charger...but I wonder if there can be problems in the future becase the Amperes number is too low....

Is this charger at least good for newer generation laptops?



Thank you very much! :)
 
Solution
markwp
As long as the voltage is compatible and the pinout on the brick plug matches your laptop, the amperage is not going to make a difference other than slowing the charging rate. Your laptop can charge at 4.74 amps (4740mA), but the charger is only capable of 4.2 amps (4200mA), therefore the charge rate is somewhat slowed.

As far as being good for newer laptops, the same criteria applies - it the voltage is within spec and the pinout matches, you should be fine.

Mark
Sort by date Sort by votes
markwp

markwp

Dignified
Jan 22, 2013
3,183
0
14,960
As long as the voltage is compatible and the pinout on the brick plug matches your laptop, the amperage is not going to make a difference other than slowing the charging rate. Your laptop can charge at 4.74 amps (4740mA), but the charger is only capable of 4.2 amps (4200mA), therefore the charge rate is somewhat slowed.

As far as being good for newer laptops, the same criteria applies - it the voltage is within spec and the pinout matches, you should be fine.

Mark
 
Upvote 0 Downvote
Solution
M

miguelfire

Honorable
Dec 25, 2012
12
0
10,510


Well the laptop is so old and heavy I rarely use its battery, I use it as a desktop computer. So the performance of the CPU is not going to get less if there are less Amperes? :)
 
Upvote 0 Downvote
M

miguelfire

Honorable
Dec 25, 2012
12
0
10,510


Ok thank you:) could you may be explain to me why that doesnt affect the cpu?is it because as long as the result is 90W, the rest doesnt matter?
 
Upvote 0 Downvote
markwp

markwp

Dignified
Jan 22, 2013
3,183
0
14,960
Your laptop will "pull" only as much power (either from the battery or from the brick) as it needs to operate. The laptop does not operate on 19v, it operates on 12v. The 19v from the power supply is to provide for faster charging of the battery. When you are running on the power supply only, internal circuitry reduces the input of 19v to a usable 12v. Your cpu is getting all the voltage it needs.

Mark
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom