I bought mine at aircraft-world.com... Mike said he is getting more configurations in soon (he really likes them).
Redshift had kinda reviewed the Hyperion Swift 20C packs and said they blew his FP 25C packs 'out of the water'... these are the same cells (same new cell chemistry/manufacturing process) as the Swifts... so if they are any indication, then I am wondering if they are actually all the same performance cells and they just label them differently?
But, if you want a 6s 25C 5000 pack, the pack resistance is 9.1mohm, whereas my 4200 3s 35C packs are 4mohm, so for 6s, times by 2, for 8mohm. Not much difference there. I would have gotten the 25C packs, but they don't fit in the E-revo batt compartments.
Here is the link where I got mine.
http://aircraft-world.com/shopdispla...-Po+-+HYPERION