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Laptop Battery

bob4432

bob4432

Lifer
have a T42 that i have had for ~ 1 1/2 yrs now. when brand new i would 3.5-4hrs on a charge and recently it has fallen dramatically to about 1hr. i normally let it go down very far before charging but this thing gets used many hours per day, in fact i would say it is normally on 10+hrs a day and sometime plugged in the whole time.

is this about normal for a battery to drop like this? also, if it is, is there any brand i should get when i buy a new one? are the 3rd party ones ok or should i go w/ the lenovo one?

thanks in advance,
bob
 
I read somewhere recently that you can expect a laptop battery to last upto 500 recharges.

Using it once a day with battery in all the time - discharging/recharging 1.5 years.
Looks like they were right.
 

" i normally let it go down very far before charging "

This is what kills Lithium Batteries more than anything else. I have a Dell Inspiron 5100 that is 3.5 years old using the original 9 cell battery and I haven't noticed any decrease in battery life. There probably has been some loss, but not enough for me to notice. I only use it on battery power when I have to.

pcgeek11
 
I have a Toshiba Satellite 1415-S105 ... it is over 5 years old .. Original Battery still in it
 
Originally posted by: pcgeek11

" i normally let it go down very far before charging "

This is what kills Lithium Batteries more than anything else. I have a Dell Inspiron 5100 that is 3.5 years old using the original 9 cell battery and I haven't noticed any decrease in battery life. There probably has been some loss, but not enough for me to notice. I only use it on battery power when I have to.

pcgeek11
Click to expand...

i was under the impression that you were suppose to let the battery get low and then recharge, not recharge when it was at say 80%?
 
The variation between batteries, chargers, and the way user use them is so big that the only rule about it is that there is No rule.

From experience it seem to me that sloppy users lose the Battery in about a year.
 
there are rules based on the battery technology. laptops use lithium ion batts, and they dont really care when they are recharged and they certainly dont need to be fully drained before recharging (thats nicd batteries). generally, lithium batteries have a finite shelf life wether they are used or not, so under normal conditions they will only last a couple years. they do NOT like to be left standing fully drained, in fact a completely flat ion battery can permanently damage itself if left alone for more then a couple days without a recharge. 5 years is a good life span, but certainly they wont hold as strong of a charge as they did new. figure you dont really charge a laptop more then once a day, so 500 recharges sounds like a lot more then 1.5 years lifespan, thats why they say it like that. most people seem to get a full two years out of their lithium batteries before they really start noticing performance issues.
 
The standard battery in my Acer 4402 lasted about an hour two years ago when it was new. It still lasts about an hour; depends on what you're doing w/the laptop. Surfing the net will net you about an hour. Watching a movie, 45 minutes if you're lucky.

I use my laptop as a "desktop replacement" when I travel on business, which is pretty frequent. I don't rush through responding to emails or collaborating on documents; I wait until I'm comfortably in the hotel room...and I plug in the charger. <--So, the crappy uptime the battery gives me isn't really a problem.
 
i guess it sounds right then as the laptop, on some days, may get charged 2-3x, so i am sure it has been charged over 500x
 
Originally posted by: bob4432
<div class="FTQUOTE"><begin quote>Originally posted by: pcgeek11

" i normally let it go down very far before charging "

This is what kills Lithium Batteries more than anything else. I have a Dell Inspiron 5100 that is 3.5 years old using the original 9 cell battery and I haven't noticed any decrease in battery life. There probably has been some loss, but not enough for me to notice. I only use it on battery power when I have to.

pcgeek11</end quote></div>

i was under the impression that you were suppose to let the battery get low and then recharge, not recharge when it was at say 80%?
Click to expand...

Not all the time. I don't know how Lithiums work, but rechargables of old used to get a adapt so you had to very it's drain and recharge levels.
 
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