I took a few years away from RC. I want to take it up again. I fly giant scale, 1/4 scale, gas. I was running dual A123 2S packs. Dual RX switches with charging jacks. The ignition uses a BEC that i can switch from the TX.
My old A123s are at about 1/2 the rated capacity. A123s are now more expensive. At $13 a cell, that is $52 a plane, and with four planes, that is a lot.
For somewhat less money, and less messing around building packs I could just use these:
https://hobbyking.com/en_us/zippy-fl...epo4-pack.html
I do want to stay with LiFe batteries. I am not interested in LiPO or NIMH.
Any opinions on the zippys or something similar?