I think its good to get those chargers with refresh functions.. I uses an external flash, and most times, I can't deplete the batteries completely. Think there is a memory effect if its not completely drained before charging again. I usually end up depleting the batteries by putting it in my discman and using it till the power drains totally..
but sanyo is good.. i have 3 sets of sanyo 2300mAH batteries and are very happy with them..
I've heard and read (cannot recall source at the moment) that Ni-MH batteries do not have memory effect, only Ni-Cd. In fact refreshing Ni-MH batteries does nothing more than reduce the number of charging cycles for those batteries.
synapseman: you are right.. did a search on google and realised that ni-mh doesn't have memory effect...
reconova: dun really know, cos my digicam uses lithium-ion.. but i dun have good experience with digicams that use ni-mh.. borrowed a fren's fuji digicam, and got only 5 shots before the low batt indicator came on! and this was on 2 sets of fully-charged 2300mah batteries..