I have Olympus E-PM1 setup with Olympus housing with Zen dome port and single YS-D1 strobe.
I have used the strobe always in manual mode with camera flash power set to lowest and LCD screen of camera
used for shooting.
This was used camera setup and came with 2 third party BLS-5 battery. Intitial days of diving
the battery used to last me for almost 2 dives of 45-50 minutes. But now it has started to bloat up
and don't even last for some 50 shots.
Now for the replacement battery, I see the cost of OEM olympus batteries are 3-4 times than the third party battery.
Question is, If I buy OEM BLS-50 battery, approximately how many shot will it last with flash ON.
And is there any particular third party brand which is close to OEM battery performance?
Thanks in advance