Battery is drained after couple of weeks

Does the battery gets drained even after not turning on the laptop for ac couple of weeks? When I start the laptop, battery meter shows only 20%, even though I had charged it fully and didn't use for two weeks. Is this common, and if so should I remove the battery and what precaution should be taken. Is it ok to leave the battery in and let it discharge, does it affect the battery life?

 

Battery Guide?

 

Batteries definitely discharge no matter what. Some people say if you remove them and keep them in a cool dry place they last longer.

 

I am concerned because if I remove the battery everytime then it might make the connection loose over a period of time. Is it ok to leave the battery in, and let it discharge without use, does it affect the battery life?

 

If the laptop is off, then it is cold and not powering anything (except some small internal components).

When you aren't using the laptop just store the battery and laptop separately.

 

I've a second laptop and use it once in a week or so, My only concern is that if I remove the battery everytime it could make the connections loose, so is it better to leave it in.

 

What model notebook?

The batteries are usually a slide/ snap into place. How could that weaken the connection?

 

It's HP Pavilion dv6700 SE, it is same as 65xx except for white color and keyboard. I've also read where people talk about dust getting into battery connection if you remove it.
Is there any stting to tweak so that the battery won't drain (or atleast drain very slowly) if its left in the laptop for weeks without turning it on.
Last time the battery was drained to 20% for nothing, so I'm concerned about battery health if its left in.
What do people do if they have a second laptop which they don't use frequently?

 

we take out the battery. If you only unplug it/plug it in once a week, then it will take quite a few years before you break the connection.

 

If you want REALLY in-depth knowledge on batteries, check out sites like Battery University, where they discuss self-discharge rates.

Specific LiIon discussion begins here

This is a good site, and it IS updated, as they even cover the relatively recent A123 LiFe "Nano Phosphate" cells. In short (no pun intended), batteries left with no load, nor charging, will self discharge. LiIons are best stored with roughly a 40% charge, and a 59 degrees F. Self-discharge rates on a LiIon cell should be less than 10% per month, at normal room temperatures, as shown here:




He has alot of info to share, including best ways to care for your batteries.

Good site, IMO.


T

 

I wouldn't worry about it.

 

Does the frequent self discharge in Li-ion batteries affect the same way as frequent charge-discharge cycles? I've read that if you let battery discharge to 10-20% frequently (deep discharge), then it affects the battery health.

 

Not sure about repeated, but i do know Lithium-based cells do NOT like getting brought close to zero, and will fail totally. Not that there will be fireworks, I mean they will be useless, as they will not charge, and not put out. They will just all of a sudden dump, and go to like .3v, and will never do anything. SO, be sure to NOT discharge your battery to zero, but your lappie's charging system+Windows will pretty much not allow that.

However, I dunno how BIOS' are - if you're in the BIOS, and the battery is at, say, an actual 1-3%, you're risking trashing the battery beyond hope.

T