Also you have the intellicharge I4, which can charge (if I am not wrong) at 1A per battery, but I am not sure if if you put 4 at the same time it can charge at 1A or less
I'd be surprised if you go with anything other than the Intellicharge i4 v2. The charge rate is 750mA,however 750mA gets split in half and divided between the channels (channel 1 being slots 1&3 and channel 2 being slots 2&4 - so with 4 cells loaded, they'd each be charging at 375mA. Rather long to charge 4 cells (i.e. rated 11 hours for 4 cells). See comments here.
Thanks for that info, Garry. I knew it was slow with multiple cells in it, now I know why. I have tried charging 26650 cells in the i4, can take all day - literally. I now use a single bay Xtar USB charger for my 26650's - takes 1/3 of the time. The Xtar WP6 II is a good charger and while it is a bit more expensive, I believe it charges at 1200mA per channel in series of two, so 2 cells (or 4, or 6) would charge at 600mA. Correct me if I'm wrong but I think it would cut charge time to under 6 hours. Something to consider.
As far as a Hobby charger goes, you'd have to search around and get input from others as I don't have one nor do I know anything about them. (Though I'm starting to consider one for discharge tests.) Seems the Turnigy Accucel-6 is well liked around here for a cheap one.
Still faster than 11 hours Can even charge the batteries in the car during a drive to get enough juice in them to power the torch much longer than with a late I4 charger