Hi Fizzy
I typed up the previous reply, went to do something else, then posted it after you posted the one at 10.28AM (my time). Good luck with the Imax charger, a lot of people use it and it should be good for charging 4s at 5 amps if you need to I think. If you need any more help just post on this thread again and I will try my best to answer

Aston177