ORIGINAL: GSR
Two packs, two switches and do what Chad just said. I have been running them this way for about 18 months now. Sold all my regulators, powerboxes, schmowerboxes, schmartflys etc- opens up a lot of room in your plane. As the proto-hippieThoreau said ''Simplify, simplify''Scotty
Ditto.
FYI, with two A123 batteries connected to a rx you can not balance charge them both at once. The common ground interfers with with the charging logic and generates a "reverse polarity" message on my Cell Pro 10-S. Took me a while to figure out that I had to disconnect one battery lead or charge them one at a time. Not really a problem since they charge up so fast.