 |
 |
 |
|
 |
You are not logged in.
Hi,
Sorry about asking so many questions (I am very excited about my new pc), but I haven't been able to find all by battery questions answered in one place in Google searches.
After you've "trained" your battery by draining it to 10-20% and then charging it to full a few times, without interruptions, is it okay to charge your battery when you are down to 40% or so? Will there be adverse affects?
Similarly, if you use your EEEpc while it is charging on the AC adapter, I know it massively increases charge time, but is it okay to do this while you are still "training" the battery, or will doing so interfere with the charge memory?
Can repeatedly removing and replacing the battery lead to wear? I try to minimize this, and only do it if I am expecting extended use on an AC adapter?
Offline
Not really answering your question but...
I don't believe "training" the eee's battery is necessary, since it is li-ion (not 100% sure so someone pls correct me if I am wrong). I don't recall where, but I read on a post or wiki on here that said to just make sure you charge it up completely for its first charge, then not worry about it. I used it like crazy during that first charge too! I followed that and have been getting 2.5 - 3.5 hrs depending on use w/ eeexubuntu and compiz installed for the last four weeks I've owned it with all day everyday use.
Not sure about an answer to your question though. Or maybe I did.
EDIT: Found it. Look here http://wiki.eeeuser.com/guidebooks:charging
Last edited by ion77799 (2008-02-22 4:48:12 pm)
Offline
To my knowledge, no commercially-available consumer-market rechargeable batteries have ever needed "training" - it's a bit of a myth, as I understand it. Whilst some advise to calibrate a new lithium-ion battery by charging it to full on first use, and then using it until the computer turns off once, or once every six months (it seems to differ depending on who's advising it), it really doesn't actually seem to matter, for any device, in my experience.
Don't worry about taking the battery out and putting it back, either - I'd imagine they wear-tested that during the production process.
Simply recharge when the machine advises you should. Other than that, just use your new machine and enjoy it! 
Offline
Thanks! If there is no memory issue, is there any disadvantage to recharging at around 40% instead of 20%?
Offline
The initial cycling of batteries was beneficial in the days-of-yore when primitive NiCad technology was starting if you wanted to get maximum capacity out of them. Now with NiMH and lithium this is not needed. More important now is to be sure to AVOID COMPLETE DISCHARGE which causes internal damage to the cells and prevents recharging. Spares for this puppy seem to be rare as hens teeth.
Offline
Battery memory is no longer a problem either. (ie loss of capacity due to incomplete discharge-carge cycles)
Offline
I would think the computer shuts down long before there's any danger of reverse charging any cells from over-discharge.
Offline
Brendan83 wrote:
Thanks! If there is no memory issue, is there any disadvantage to recharging at around 40% instead of 20%?
None at all. 
Offline
I wrote Duracell a while ago concearning Li-Ion batteries, and they just replied me to never let it go empty.
Li-Ion doesn't have a memory issue, but it does break down the more you use it, and if it's completely decharged, might never be able to charge again.
They advised me to charge it at least every 2 to 3 months (on a 640mAh device I had back in the days). Eee's battery needs to be recharged at least once a year in case of being plugged out of the device, being stored somewhere. If not the battery might run completely empty, and the recharging of 0% energy Li-ions is 'impossible'! (they said, allthough you might get a battery back to working, but you'll need many days of charging to get it to work again)
Further: to increase battery life, use the AC as much as possible! Even if you only have used 2% of your battery!
I'm not saying you should keep it charging all the time, even when you're not using the eee; but if you do use your eeepc, plug in the AC!
Your battery has an internal cpu(stored in the battery hardware), that will keep track of recharge cycles, and will make sure every cell has been charged equally (so that not one will be continuously balasted and suffer of 'weardown' but a 'rotation cycle' of internal cells will be done).
Best is to use AC as much as possible to let your battery live the longest!
For inevitable even Li-Ion batteries will wear out.
Last edited by ProDigit (2008-02-23 9:42:26 am)
Offline
I am experiencing some battery problems with my eee pc 900a with linux.
After 24 hours of charge, the battery level is just as much as 7%
I will experiment with leaving the unit in charge for a few days hoping to solve this issue
Any hints will be gratefully received
Offline
If it is still under warranty, contact the seller because it sounds like the charger might be faulty.
Offline
No matter what the experts say, i've had bad luck with laptop batteries when leaving them on AC too much. I've got 2 Toshibas and an IBM laptop here that have batteries with poor battery life because they were left on AC and charged when not run down enough. I have other devices with li-ion batteries and they have better charge and last longer when mostly discharged almost all the way each time. And that's what i plan to do with my 701
cheers
Offline
