ProTek R/C 1S "High Power" Blade 120SR Li-Poly Helicopter 25C Battery Pack (3.7V/550mAh)
[PTK-LP-550-1S25]

ProTek R/C 1S "High Power" Blade 120SR Li-Poly Helicopter 25C Battery Pack (3.7V/550mAh)
drew - Rating: 5 of 5 Stars! Verified Owner Saturday, December 10, 2011
i think even a little more power than hyperion 550 running in helimax brushless conversion mcp x great battery