Professional battery 11,1V 1000mAh. Type with the small connector. Require just Li-Pol (Li-ion) charger.
Parameters:
 
Type: Li-Po
Capacity: 1000mAh
Voltage: 11,1V (3 cells)
Discharging current: 20C/30C
Connector: small Tamiya
Weight: 71 g
Diameters: 10,3 x 2 x 1,6 cm cm
Please note that the LiPo not be discharged below 3V per cell, and should not be reloaded more than 4.2 V per cell. Another advantage of the LiPo battery is a small percentage degree of self-discharge. Not used per month package loses about 3-5% of energy. Package should be supervised, because the very long storage may lead to discharge below the minimum permissible value (3V per cell) and irreversible chemical reactions, which may adversely affect the package including the permanent damage, in extreme cases - the ignition. LiPo battery should be charged when average about 70%.