I started racing 6 months ago and thought I would get some inexpensive batteries to start with. I run a Losi SCTE 2.0 4wd with a Tekin 4600 and an Orion R10 pro.

I bought 4 of the Turnigy nano-tech 5300 /50-100c packs with the intent I would buy some better batteries as I progressed in my driving skills and could justify the cost....

Long story short, I run in the A-main with the rest of the fast guys and I am still using the Turnigy batteries... no problems and plenty of power.