been playing with the new grip for a while now,
the battery option and charger using the EN-EL4a is just too expensive here in Australia
started out with Lithium batteries, work a treat and appear to last a long time, (Varta Lithium), (and cheap, well, cheap here in Australia )
Appears everybody has gone for the Eneloops, both for their flashes and grips due to performance, shelf life and the ability to hold charge over a long time
Spending a bit of time with Mr Google, I see there is a large variance in AA capacity ,
To mention just a few,
2000 mAh, (Eneloop)
2400 mAh, and
One would think the bigger the better? But consensus appears to say the lower capacity Eneloops @ 2000mAh are the best
Julius Sumner Miller used to say, "why is this so ?"
Any technicians here in this field?