Just remembered I have an old RC boat, it's a beasty thing, but I'm only interested in the batteries, it has two 2100mah 7.2 Ni-Cd battery packs. I don't have the charger that came with the boat, has anyone got anything suitable?

They're also very light in comparison to the battery we were using, both weigh 600g or so, as against to over 2kgs!