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12-08-2010, 04:13 PM   #1
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Pentax K-X Quiescent Power Drain

FYI,

I measured the quiescent current (current when camera is off) of the K-X to be ~20uA.
I measured it while the camera was being powered by newly recharged eneloops.

The current is variable, but I averaged until the reading became stable on my meter.

cheers,

Sam

12-08-2010, 04:31 PM   #2
Ira
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How does this affect my life?

Do I have to stop sleeping with it cuddled to my cheek because of the radiation?


Last edited by Ira; 12-09-2010 at 03:58 AM.
12-08-2010, 04:42 PM   #3
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With that it should manage 100000h or over 10 years on 2000mAh batteries :-)
12-08-2010, 04:47 PM   #4
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QuoteOriginally posted by srankin1826 Quote
I measured the quiescent current (current when camera is off) of the K-X to be ~20uA.
QuoteOriginally posted by Ira Quote
How does this affect my life?
Do I have to stop sleeping with it cuddled to my check because of the radiation?
I doubt if you have to anything.....

The average capacity of the eneloop AA is about 1,900mAh.

So a current drain of 20uA would make the eneloop last
(1900/20) * 1000 hours = 95,000 hours -
this is approx 3,958 days!! -
well over 10 years.

I think the eneloops' own self-discharge is faster than that

12-10-2010, 06:45 PM   #5
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QuoteOriginally posted by srankin1826 Quote
FYI,

I measured the quiescent current (current when camera is off) of the K-X to be ~20uA.
I measured it while the camera was being powered by newly recharged eneloops.

The current is variable, but I averaged until the reading became stable on my meter.

cheers,

Sam
This is good, did you have a problem with battery life?.
12-12-2010, 01:56 PM   #6
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QuoteOriginally posted by Ex Finn. Quote
This is good, did you have a problem with battery life?.
The first set of Energizer Lithiums (that came with the camera) died overnight while the camera was shut off. 3 of the 4 cells were o.k. at around 1.7V. The 4th was really dead at 0.4V. This problem has not repeated on a set of fully charged Eneloops. Probably just a bad battery.
12-12-2010, 03:23 PM   #7
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That 0.4 V cell is defective. You might call Energizer customer support (800-383-7323) explain the problem you might get a set or two of those nice lithiums for your trouble :-)
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