Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This question already has an answer here:

I sometimes work the whole day with the machine. at that time, I keep my lap plugged in the the ac adapter and work with the machine. when im done, i remove it. People say its ok to do this because most of the laps will auto turn off power to the battery if its full and direct them to the notebook. is this true for Asus?

share|improve this question

marked as duplicate by Dennis, Scott, Renan, n0pe, 8088 Mar 8 '13 at 4:18

This question was marked as an exact duplicate of an existing question.

@Dennis Different manufacturers handle this in different ways. HP say it can and Asus sometimes say it can't. Thats why I specifically asked about Asus notebooks. – THpubs Mar 8 '13 at 1:52

I've had my Asus laptop working on AC power with battery inserted almost all the time for 2 years now and it seems that battery is totally fine.

What's more, it may be worse for your battery to unplug the charger that to leave it plugged in, as its durability depends on the number of charge cycles. See my answer here.

share|improve this answer
It will surely depend on battery type. My battery still gives me about 4 hours of work, like when it was new. – gronostaj Mar 8 '13 at 0:09
Most people have the same battery type on their laptops these days: Lithium-Ion. I am sure if you take a look at the label on your battery it will say the same thing. It's great news that it still works well. – Austin ''Danger'' Powers Mar 8 '13 at 0:32
@gronostaj i just contacted Asus and they told me its not safe and uplug the power when the battery is charged! – THpubs Mar 8 '13 at 0:35
@EApubs - you should post that as your answer so your question will close and your answer can help others that do not scower through the comments. – Carl B Mar 8 '13 at 3:51
As listed here "Li-ion does not need to be fully charged, as is the case with lead acid, nor is it desirable to do so. In fact, it is better not to fully charge, because high voltages stresses the battery. Choosing a lower voltage threshold, or eliminating the saturation charge altogether, prolongs battery life but this reduces the runtime. Since the consumer market promotes maximum runtime, these chargers go for maximum capacity rather than extended service life." – Srdjan Grubor Mar 8 '13 at 5:39

Not the answer you're looking for? Browse other questions tagged .