Thread: What is wrong with UPS?
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Old 10-02-2009, 07:07 AM   #58
theducks
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Quote:
Originally Posted by mores View Post
I'm sorry, I fail to understand what you are telling me.
Please circle the correct answer:

*) No need to run the battery down
*) No need to run the battery down on the first charge only
*) Whatever you do, it won't matter, all batteries die.
ALL of the above,
Except that I would say "Batteries run down".
"Die" is when they can not be recharged,
which can be caused by cycles (age) and OVER DISCHARGE << this is very bad, which is why I do NOT recommend discharging until it stops with an un-calibrated gauge.

80% of normal voltage is considered DISCHARGED. Below that may result in permanent damage to the battery pack. Do not leave a discharged battery this way. Self discharge will drop the voltage more and any further discharge may cause a internal cell (out of 3) to "flip polarity".
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