battery question ( 17' laptop inch models)

That makes sense as I've killed 2 batteries in my thinkPads and I very rarely use 'em on battery power.

I thought you said that the battery lasts longer if you take it out?

if the battery was taken out it should last just as long as it in the machine... as long as the battery is not being supplied any juice or any juice leaving the battery then it will be ok...its just like a LI battery found in a package they stay good for a long time without being used...

I have a m9750 SLI system and once again the battery is door knob. Fully charge it lasts for maybe 5 minutes on battery power. This computer is on its second battery already. Is there something I should be doing to not kill off the battery? This one lasted about a year, good thing the system is still under warranty so I will just have alienware send out another free replacement

Take the battery and place it in the freezer to help with longevity... this is what some people do...

OK guys I got time so here goes. First I have never not run my notebook without the batt in for 13 months. I use the batt less than daily but certainly more than weekly. Run it down pretty good in use a couple/three times a week. I always let it fully charge from what ever point of discharge it is at up to full charge if time permits.

So in 13 months of this completely non conservative usage my battery wear level is 10%. Listed capacity is 46002mWh current capacity 44374mWh. All the conservation approaches do not fit into my desired usage.

That said here are the fundamental principle's in play. A Li-Ion Li-Poly starts to lose capacity to hold a charge from the day it was made. higher temperature accelerates this loss. Storage at 40%/50% slows the loss irrespective of heat if equal. So for long term life/storage 50% at 40F will lose less ability to hold charge vs 100% at 100F. Over any given time period.

How one reacts to these realities has more to do with ones needs than any absolute clear right or wrong. I have already said I do nothing to prolong my batts life. I will replace when it fails. A bird in the fridge is of little use vs a bird in the notebook if you get my drift? But yes that is me and my needs.

Here is a graph from Battery U.



I do not agree with the extent of above table from my own personal experience. But I do agree with the trends they are trying to exemplify.

You know a notebook can get pretty hot and hot and fully charged are the two main demons of battery longevity.

All do as you like, take the info as you like. Freezer? Naw, fridge maybe in a plastic bag with a disiccant.

Edit: Battery U has changed their graph since I last looked. The numbers now look more realistic than the older ones. I find them to be more realistic.