These batteries are every bit as good as the more popular name brands, at a fraction of the cost. They have nice connections, and seem to be built well. The first few bashing sessions I did with these, the battery was still going strong when I got bored with my rc, and decided to put it away.
I took my truck around the track, and finally ran one out after about an hour of sporadic driving with my 4x4 truck. Two of these batteries fully charged will certainly be more than enough for bashing, and practicing. You will get bored before you run out of battery power, trust me.
These have a high C-rating, which is what you want for better power distribution.
I originally bought these for temporary batteries until I am race ready on the track, but am so impressed with these, that I will just buy more of these. My much more experienced rc driving friend was so impressed that he bought some as well.
The only small complaint I have, is that the rubber grommet around the power cable will pop out of the casing after a while. This can easily be remedied by adding a dab of glue, and pushing it back in place. Buy these if you want a cheap priced, high quality battery. You will not be disappointed.