these are the top 3 performers...
AkkuDB
the LG and the samsung aren't very known. you can likely get them anywhere they're available and be likely to get a good battery. the sony could possibly be faked due to popularity.
i, personally feel it's worth mentioning that i think the sony is over rated since it has a tendency to over heat when discharged at 2/3 of it's continuous capacity...
AkkuDB
to paraphrase...
Careful: in a continuous discharge, this cell will get extremely hot - up to 80°C at 20A, up to 125°C at 40
sony rates this battery at 30 amps continuous discharge and rates their lithium cells up to 60°C max.
i have the sony vtc5s, vtc4s, samsung 25Rs and aw 1600s on hand. in my opinion, i prefer the samsung cells over the rest. they tend to hold their voltage higher for longer and produce less heat within the cell under my use from my experience. all are great cells. can't really go wrong. though, i feel the samsungs are a clear winner. you can get them cheap from fasttech, too. would be convenient if you're planning on ordering your mods there.