Designed specifically for Helicopters. The towerpro H40A might packs all the punch you're going to need, without the expensive packaging!

Spec.

Amp rating: 40A

Burst Rate (15sec): 50A

BEC Current: 1.5A

Voltage: 7.4-11.1V (2-3 cell Lipo/5-10 NiMH,NiCd)

Dimensions: 70x31x11mm

Weight: 47g