I'm using Sanyo 1850 and GP 1600 batteries, with the GP rapid charger that comes with the GP 1600 batteries. It's working well, at least 1 charge can last me the whole afternoon.
Just that the charging time is kinda long, about 4-5 hrs.
Que, after your shooting, do you recharge the batteries and keep it in your cabinet till the next use? Or only charge it when you are gonna use it? I'm wondering will there be much power loss, if you keep the charged batteries in the cabinet for let's say, a week or two.