I use a Hobbico Accu-Cycle Elite. I tossed Hobbico support a question about being able to charge LiFe batteries with it. Here's their response: <span sans-serif="" serif="" sans="" microsoft="" style="font-size: 10pt;">The Elite is not designed to charge LiFe(3.3V per cell)batteries, only LiIon (3.6V per cell) and LiPo(3.7V per cell). There is not a way to program it to charge LiFe batteries. "
Darn. To use A123 I'll have to add the expense of a charger ...</span>