Charger voltage importance? 18.5 vs 19
August 1st, 2016
I’m using this big adapter rated 18.5 V 6.4 A and on the laptop it is written 19 V 4.64 V.
Would this be a problem?
Would this be a problem?
Yes it would!
Generally speaking, When it comes to replacing AC adapters, The voltage always has to be identical and the ampere rating can be either identical or higher (But not lower!), It’d only use as much ampere as it needs to. 0.5V is not a huge difference, However, It could cause instabilities, So better use a proper adapter!
It won’t matter.
The charger is a higher voltage than the battery anyway; they have to be to charge. (like a car battery – 12V battery, 14.8V from the alternator)
Most lappy batteries are 10.5 or 11V, some are 14V.
Mine is 11V with a 19V charger – and 18.5V charger will also do the job.
Make sure the terminal polarity is the same – that’s important.
Would this be a problem?
Yes it would!
Generally speaking, When it comes to replacing AC adapters, The voltage always has to be identical and the ampere rating can be either identical or higher (But not lower!),
Hey, that’s what I was thinking for about 2 years, untill my supplier told me otherwise and gave me this charger.
The only problem I have encountered untill now was using a 18.5V with a DELL that needs 19V. HP doesn’t make an issue out of it (as far as I know).
It won't matter.
The charger is a higher voltage than the battery anyway; they have to be to charge. (like a car battery - 12V battery, 14.8V from the alternator)
Oh, I understand. The battery is indeed 11V I think. I have to verify!
Make sure the terminal polarity is the same – that’s important.What do you mean by this? How can I check this?
look at the symbols bit hard to pout this in to context but should look something like this
https://www.google.co.uk/search?q=top+priority&source=lnms&tbm=isch&sa=X&ei=1Q2cUsDmLqLH0QWbqYHICA&ved=0CAcQ_AUoAQ&biw=1366&bih=639#q=charger+plug+plyaritey+&tbm=isch&facrc=_&imgdii=_&imgrc=5aHezl8ucr0X_M%3A%3BBkgsok5bzFSp5M%3Bhttp%253A%252F%252Fupload.wikimedia.org%252Fwikipedia%252Fcommons%252Fthumb%252F6%252F68%252FAC_adaptor_polarity.png%252F800px-AC_adaptor_polarity.png%3Bhttp%253A%252F%252Ftech-tips-ireland.blogspot.com%252F2010%252F03%252Fhow-to-test-your-laptop-charger.html%3B800%3B221this GOT TO MATCH the laptop you’ll fined this type of pic on the charger and one on the back of the laptop
if this is wrong you will cause damage to charger or laptop
Please remember to double check that all your links have been coded. #3.10 links must be coded - including, but not limited to, e-mail addresses, passwords and internal links.
~~Your looking at using a Cooler Master NA 90 or 120 or SNA 90 or 120.
@: hey, man. Your link does not work?
@Sword: I don’t get what you mean by that?
@Sword: I don't get what you mean by that?CM’s power adapters are rated at universal 19V applications, all you have to do is find a unit that supports more current than your laptop’s requirement. The 120 series should be good as its more than capable of 6A, it is likely to run cooler than the 90 series.
@Sword: I don't get what you mean by that?
CM's power adapters are rated at universal 19V applications, all you have to do is find a unit that supports more current than your laptop's requirement. The 120 series should be good as its more than capable of 6A, it is likely to run cooler than the 90 series.Why would it run cooler than the lower rated 90 W?
Haven’t checked yet, but I would go for the 90 (I only need 4.6A), unless the price difference between the two is justified.
The 120 series should be good as its more than capable of 6A, it is likely to run cooler than the 90 series.Why would it run cooler than the lower rated 90 W?
Haven’t checked yet, but I would go for the 90 (I only need 4.6A), unless the price difference between the two is justified.[/quote]
1.72A difference is allot of energy, if you were to have two power bricks ran side by side under the same condition, the higher rated one will run cooler because its designed to handle more, it will also have higher rated parts so it would last longer if that matters.
Up to you, in some places the difference between the the two models is only $5.
Asus and FSP also make universal laptop adapters.
Fluffbut wrote: Select all
Make sure the terminal polarity is the same - that's important.
What do you mean by this? How can I check this?
This:
http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/AC_adaptor_polarity.png/800px-AC_adaptor_polarity.png
MOST – 90% will be the same – but you don’t want to be the 10% that are different just to be awkward.
The usual problems are from cheap china chargers, dirt cheap crap that they don’t care about.
A named charger, company brand or one designed for your laptop – feom a reputable supplier – is probably OK.
Answer #11
If you want to be 100% sure, check with a multi-meter.
Set it to volts and probe both sections of the burg connector with the IEC plug connected to the mains. negative will have the multimeter red – volt on the red lead. This is not required unless you use a dodgy power pack.