[Nut-upsuser] Shutdown after 5 minutes?

[Doug Reynolds]

Julian H. Stacey wrote:
> midsummerdream.org> <450A4C01.3030908 at xs4all.nl>
> Comments: In-reply-to Udo van den Heuvel <udovdh at xs4all.nl>
>    message dated "Fri, 15 Sep 2006 08:45:21 +0200."
> --------
> Udo van den Heuvel wrote:
>   
>> Rob wrote:
>>     
>>> Here's an updated set of info on my UPS, which includes what upsc
>>> reports when the power is pulled by the computers are still on:
>>>       
>> We had a power outage this morning and I did some monitoring on the UPS
>> which is connected to my small Linux box.
>> Battery charge did not go below 70% when the box died after about 5
>> minutes. No shutdown scripts, no warnings of shutdown, nothing.
>>
>> When you add the info that Rob has (still going down after 5 minutes
>> although...) one might suspect a bug somewhere.
>>     
>
> Start with basics: Suspect the battery. Even the microprocessor
> inside the UPS that NUT talks to, neeeds good power, if the battery 
> suddenly drops, the microprocessor may not have time to warn NUT
> of an approaching or actual failure, & NUT might not have time or power.
>
> As I wrote to someone else recently on this list: A battery can
> appear to have a good charge state (= voltage) even when it's gone
> bad & developed a high internal resistance.  That happened to me a
> while back when I wasn't even running any software to control UPS.
> UPS had been running for years, with charge state good (LEDs). I
> pulled power, & it dropped out after maybe 10 secs ! 2 of the 4
> batteries had good voltages but high internal resistance
I really doubt it is the battery.  I have the same CyberPower unit, new 
out of the box, and it does the same thing..