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Batteries, how old can they be before they suffer
Posted: Fri Mar 17, 2006 11:17 am
by rcrooks
Alright, Im looking for the ultrabay battery, and I found some NEW ones on ebay, but I am wary of buying them because the manufacture dates on some of them are almost a year old.
How old can manufacture date be before they start to lose their juice and holding ability?
Posted: Sat Mar 18, 2006 6:40 pm
by ThinkPad R
I don't think they would lose juice until one starts using it.
Or is it not? It wouldn't make much difference.
For example, my battery was manufactured in 1/4/04 & I got the computer @ march.
& then I used it now for 2 yrs. From maximum battery life of little more than 6 hrs, now I have maximum battery life of 4hrs.
-although I have my thinkpad plugged for most of the time.
Posted: Sat Mar 18, 2006 7:10 pm
by ThinkPad R
I have a question about reconditioning the battery.
What is it exactly? Is it where you run down the battery slowly?
Or can I have some programs on while making the battery go down to 3%?
Thanks.
Posted: Sat Mar 18, 2006 9:48 pm
by AlphaKilo470
Lifespan depends on use, environment and how well the battery was made. An example of that would be the one year life expectancy on a normal use 600 battery in contrast to the original 10 year old IBM battery in my 760E that still lasts just over 2 hours.
Reconditioning is when you make sure your battery has a 100% charge, drain it to the lowest your computer will run at and repeat a few times.
Posted: Sat Mar 18, 2006 9:49 pm
by ThinkPad R
Does it have to turn off the program so that the energy is drained steadily?
Posted: Sat Mar 18, 2006 9:59 pm
by Eronous Monk
For more information than you ever thought you might want to know about batteries, go to:
http://www.batteryuniversity.com/
Posted: Sat Mar 18, 2006 10:43 pm
by rcrooks
# Do not fully charge lithium and nickel-based batteries before storage. Keep them partially charged and apply a full charge before use. Store lithium-ion at about 40% state-of-charge (3.75-3.80V/cell open terminal). Lead-acid batteries must be stored fully charged.
# Do not store lithium-ion fully depleted. If empty, charge for about 30 minutes before storage. Self-discharge on a depleted battery may cause the protection circuit to trip, preventing a recharge.
# Do not stockpile lithium-ion batteries; avoid buying dated stock, even if offered at a reduced price. Observe the manufacturing date, if available.