When is a UPS battery actually bad? APC SUA750

[Alex Hewitt]

On Tue, 2008-06-17 at 10:20 -0400, Alex Hewitt wrote:
> I recently saw a problem with an APC brand SUA750 UPS. The unit had a
> "replace battery" LED which was lit up. I replaced the unit but when I
> got around to plugging the unit in again the "replace battery" LED
> wasn't lit anymore and the unit seems to be working ok. This unit is
> just over a year old. Any thoughts?
> 
> -Alex
> 
> 
> 
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I should have looked harder before asking:

http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_faqid=10&p_created=1000309963&p_sid=rGBw9w6j&p_accessibility=0&p_lva=&p_sp=cF9zcmNoPTEmcF9zb3J0X2J5PSZwX2dyaWRzb3J0PSZwX3Jvd19jbnQ9OTUmcF9wcm9kcz02MSZwX2NhdHM9JnBfcHY9MS42MSZwX2N2PSZwX3NlYXJjaF90eXBlPWFuc3dlcnMuc2VhcmNoX25sJnBfcGFnZT0xJnBfc2VhcmNoX3RleHQ9cmVwbGFjZSBiYXR0ZXJ5IGluZGljYXRvcg**&p_li=&p_topview=1


Which basically says - the indicator doesn't necessarily mean the
battery is bad. It has some kind of timer which turns the LED on
theoretically one to two months before the battery "might" need
replacing. 

-Alex