The 
Nuprol Power 8.4v 1600mAh NiMH double stick (Crane) battery with a Deans connector
 is a reliable and safe power source primarily for airsoft guns, known for its durability and cost-effectiveness compared to LiPo batteries.
 
Product Specifications
Type: NiMH (Nickel Metal Hydride)
Voltage: 8.4V
Capacity: 1600mAh
Configuration: Crane (Double Stick / Nunchuck)
Connector: Deans (T-connector)
Cell Count: 7S (7 cells)
Dimensions: 18 x 36 x 118 mm
Weight: 180g
Features: High-quality silicone leads, manufactured in an ISO 9000 quality control accredited facility.