In article ,
says...
Put your nimh idle for 2 weeks and then check how much power it has left,
and do the same with BP-511, you will see the difference. Then there is
charging time for flashes, memory effect, how accurate camera can detect the
power level left in batteries. Nihm may be cheaper, but defenitely not the
top performer.


The memory effect for NiMH is very moderate; charging time for flashes
should be low, as NiMHs can deliver high currents (not sure how LiIons
perform under very heavy load. Concerning the storage, just recharge the
batteries after a long idle period of time.

Advantages of AA NiMH:
- widely available everywhere; in case of emergency you can even run
your camera with standard non-rechargeable AA batteries
- low cost
- no risk the proprietary battery won't be manufactured anymore one day
--

Alfred Molon
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http://groups.yahoo.com/group/Olympus4040_5050/
Olympus 4040 resource - http://www.molon.de/4040.html
Olympus 5050 resource - http://www.molon.de/5050.html