Before I start my summer vacations, I did some planning ahead , and got those Battery size converters.
As I do have a pile of NiMH for my digital cameras ( five Olympus )
The majority that I found on ebay , has had the loading area at the back,
and my opinion was and are , that this is an wrong design !!
Simply because many old fashion full size portable Radio-Cassette players,
they have one blind opening for the first or even and the second battery in the row,
and if the battery loads from the bottom of the adapter ... it can possibly fall out... when entering or removing the batteries from the device !!
Any way , the ones that I got looks well designed to me , and today that is my last day of vacations,
I can say that it is fully tested too.
.