This pack was originally designed to run in pairs for 6S power in the Yeti XL and Traxxas Revo family, and it has since proven to be an all around
3S 5200 mAh 50c Hard Case Lipo
Helios RC
This is the Common Sense Lectron Pro 2S 50C LiPo Battery with 2000mAh capacity. This 2-cell 2000mAh 50C lipo is perfect for 1/16 and 1/18 scale
Common Sense RC Lectron Pro 2S 50C LiPo Battery w/T-Style (7.4V/2000mAh) [CSD2S2000-50D]
Spektrum Smart G2 Powerstage 4S Bundle for Surface SPMXG2PS4
Helios RC
Batteries
11.1V LiPo Airsoft Battery with Deans Connector
2S (7.4V) Flight Batteries LiPo Airplanes - AMain Hobbies
Helios RC 3S 50C LiPo Battery w/EC3 Connector (11.1V/2000mAh) [HEL
, This is another great all purpose pack suitable for many different surface and aircraft applications. It offers over 15% more usable capacity than
3S 3500 mAh 30c Lipo
2S (7.4V) Flight Batteries LiPo - LiHV FPV Racing - HobbyTown