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06-09-2021, 02:32 AM - 1 Like   #16
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My old ist D* is used every then and now and rests in its box most of the time since more than 5 years. There is always a set of low self discharge rechargable batteries (a.k.a eneloop) in it. And it still uses the first backup battery. There is no issue in leaving NiMH batteries in the camera. They will not leak in the way like ordinary batteries. In over 30 years using rechargable batteries I had not one case of a leaking one.
Charging up the eneloops every half year is sufficient.


My K-10D stays in its box since ober one year now. Same procedure as with my ist D* I only have to charge the Li-Io batteries more often. Much better then drainig the byckup battery to death.

06-09-2021, 03:45 AM   #17
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QuoteOriginally posted by Papa_Joe Quote
My old *ist-D is used every then and now and rests in its box most of the time since more than 5 years.
There is always a set of low self discharge rechargable batteries (a.k.a Eneloop) in it. And it still uses the first backup battery.
There is no issue in leaving NiMH batteries in the camera. They will not leak in the way like ordinary batteries.
In over 30 years using rechargable batteries I had not one case of a leaking one. Charging up the eneloops every half year is sufficient.

My K-10D stays in its box since ober one year now. Same procedure as with my *ist D. I only have to charge the Li-Io batteries more often.
Much better then drainig the backup battery to death.
Exactly.

It was THIS THREAD with claims just not proofen but an insistance that keeping a Li-Ion or Eneloops inside one's Pentax is dangerous which brought me to start this one because quite sometimes I came across Pentax bodies with drain back-up battery and every time and then this problem was discussed here in the forum and in other ones all over the world.

The main problem is that Pentax had recommended to leave the main battery outside when storing it but I guess this is a residue from ancient times when people still used non-rechargeable batteries. Then one indeed could have the problem of those leaking.

NiMH hardly leak but it can happen due to abuse:
What could cause leakage in Ni-MH rechargeable batteries? | Panasonic eneloop
The problem is that they have a vent so gas can come out.
In some NiMH's it has happened that when they were stored for a long time with the plus-pole downwards, the vent got stuck and thus they started to leak. But this was very rare and with Eneloops it shouldn't happen at all.

The person claiming in the other thread that socalled "American specialists" warn about leaving batteries inside devices uses Eneloops in his K30, so nothing to worry at all.
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