Originally Posted by
malkiy
A high capacity 4s-6s battery will be cheaper and easier to transport. I have a 4s 16000 and barely last the day with practice. I think others are using 5s or 6s, those will definitely last you the whole day with practice. Double check with someone who is currently using that setup before buying. I think Korey Harbke is using a 6s battery.
Hobbyking, which has a warehouse in Oregon, sells large capacity batteries.
Full size car batteries are also a good option. My $90 Duracell deep cycle 35AH powers both cars (mod tc and f1) all day long with room to spare. A couple races back, a racer had his battery fail and needed to charge off my battery. Surprisingly, it still pulled through the day.