This is the Great Planes ElectriFly Power Series Lithium Polymer 1250mAh 7.4V 20C Battery Pack with Balance Connector. Ideal for bigger Park Flyers, small sport aerobats and 3Ds, small trainers, electric airplanes using Speed 400 up to Speed 600 and flat foamies.

Balancing allows all cells to fully charge to 4.20V ensuring maximum power from the pack, plus conditions the cells better so they will last longer Unique power technology offers high energy density, low weight, long life, safe operation, and environmentally friendly chemistry.

Specifications :
Capacity : 1250mAh
Number of Cells in Series : 2
Rated Voltage : 7.4V
Max. Charge Voltage : 8.4V
Min. Discharge Voltage : 5.0V
Maximum Recommended Charge Current : 1.2A
Continuous Discharge Current : 25A (20C)
Discharge Lead : 16AWG 3.1 in. (80mm) long wire with Deans Ultra Female Plug
Charge Lead : 24AWG 1.6 in. (40mm) long wire with balance connector
Pack Dimensions : 97 x 31 x 14mm (3.8 in. x 1.3 in. x 0.6 in.)
Weight : 2.47oz (70g)