After a hiatus of a few years I'm getting back into flying. It's probably been 4 years or so since I've flown. It's amazing how much has changed in that time and how much I'm having to dig in my memory to recall all of the things that were second hand before.

My big question right now is with batteries. Does anyone have experience with using A123 batteries for Rx packs? I'm not necessarily going to use them in my smaller planes while I relearn to fly however I restarted my build of the TF Arrow II and thought about using them in there.