I've been told the new R1 Wurks black shorty is good. I don't have one yet..it's in the mail, so this is not based on experience.

The protek 4250 is hard to beat. They like to swell, but give amazing numbers through their life span. Usually a battery will last 2 months or so before I give it away to a novice racer. This is the point where IR's get over 2.0 per cell.

I have swollen some huge, and still just tick along fine. I tried t explode a swollen one...

Never phased it. Amain warrantied one that got big on its 4th cycle.

This is for 4.35v racing. For 4.20, protek is still up there, but add in the fantom, graphene, and the ultimate.

A Reedy battery is coming soon.