On November/24/2009 I got a Pentax K-x dSLR to replace my K100D.
So the K100D got relegated to a backup.
I kept the set of Duracell Pre-Charged (DP-C - made in Japan, white top - confirmed eneloop re-badges) in the camera
Those were topped up charged on Jul/8/2009 and placed in the K100D on Oct/6/2009 (during a shooting session).
The K100D was "retired" after 623 shots had been taken on this set of DP-C.
The K100D has more or less been idle except for a few shots here and there since Nov/24/2009.
Since this has been over 2 years since it was retired I thought I'd see the remaining capacity of these DP-C. The total number of pictures I took over the "idle" 2+years was just 115.
Note should be made a few months ago I turned on the K100D (a few months shy of two years of being idle) - the top LCD panel came on, but the camera did not respond as expected - I had to turn the camera on/off a few times - then it did work OK - so either the camera needed to "wake up" charge up capacitors etc - or the batteries needed "waking up" - I do not know - but it is worthwhile noting.
Today Dec/12/2011 after a total of 738 shots - 623 of which were in the first month after battery installation - with the camera mostly idle and only very occasional usage -
Maha C-9000 discharge at 400mA (=1/5 or 20% capacity current) -
Remaining capacity and discharge times:
472 mAh (78min)
485 mAh (81min)
461 mAh (76min)
455 mAh (76min)
This looks pretty impressive to me as it is nearly 2.5 years (2 years 4 months 24 days) since charge - and there seems to be still nearly 1/4 capacity, also having taken 738 shots -
Extrapolating this - it means a theoretical shot count of 955 shots
(I used the lowest 455 mAh remaining capacity, and 2000mAh as the full capacity -
worst case figures).
Just to put this into context I was getting on average 1,000 shots/charge -
so having these DP-C idle for nearly 2.5 years since charge does not seem to have reduce the theoretical shot count.......
Comments?