[revengeturbo]

I`ve recently tried to install an extra 2 batteries into my xmod.
The model has had 4 4562 fets stacked on the original fets and works with no problems on the standard 4 batteries with a 32t double wound motor.
However, when I try to run it with 5 or 6 batteries installed it staggers until it has some motion, like it`s being turned on and off really quickly, then gets what seems to be full (7.2v) power.
I`ve explored all obvious avenues and all is well with connections, etc.
What is going wrong? Has anyone successfully installed this mod. without trouble?
I`ve read that the board will max out at 8.4v, but that 7.2(6bats.) isn`t a problem.
Thanks for your time...