That is what I did in order to use 2 packs of 1100mah A123 on my WH Edge 540. I use the Triton charger with a cut-off device and a balancer to limit the charge current t 1.5A. Slightly longer charge time but would not let high current pass through the two switches.

I can have 4 flights without recharging. The plane has 5 high-current digital servos.

Cheers.