I use the Turnigy Accucel -6 $25 at hobbycity.com. It is the same as the Core RC UDC-20 fuctionwise. In fact those chargers have about a dozen other clone sister and brother chargers under different manufacturers names, box/case designs & colors but are identical in function and operation. Infact I have used versions like the UDC-20 and the buttons are hard to press, brake and has poor cooling. The Accucel-6 has bigger buttons and great cooling plus it does up to 6cell this one does not. Wow that UDC-20 is one of the 'bad' knock off clones come to think of it.
This Accucel-6 charges everything out there up to 6A and this whole set up of 3 with power source (also from hobbycity) is just over $100 us dollars. And it stacks clean and nicely in my drawers/toolboxes
