are you saying you have the X4 hitec charger? I have that charger it will not charge at 5 or 6 amps on the 14.8 battery. most it will do is 3.4

even the 2s most it normally does is 4. the 50Watt per channel is what kills it. you'll just have to wait longer for a charge than one with more watt per channel.

if you have time for it the slower charge is actually better anyway.