Converting Eclipse Pattern Plane to electric
 

I am converting a glow engine 2M pattern plane to an electric with a Hacker C50 14XL motor and will be using two (in series) Thunderpower 5s3P 5700 LiPo batteries. What is the best field charger to use? Also I plan to power the charger with a 120v to 12v power supply. I would like to charge both packs at the same time. What is the best power supply for charging two batteries. This will help me get more practice flights in a flying session.

Second question - I have been following the thread on the pattern flying forum for the electrified partner. When I make the conversion to electric are there any things I need to be carefull of?

Thanks

Steve