Designed specifically for the E-flite micro series. A direct replacement for the E-flite 2S 200mah lipoly battery - E-flite part #: EFLB2002S25.More punch, more power and longer flight times are only the beginning. When tested with the E-flite micros, the differences between a regular pack and the nano-tech where remarkable! Power output and flight time were greatly improved due to the higher discharge rate and true capacity.Bring your E-flite micro to life with the nano-tech upgrade cells!Spec.Capacity: 300mAhVoltage: 2S1P / 2 Cell / 7.4VDischarge: 35C Constant / 70C BurstWeight: 16g (including wire, plug case)Dimensions: 44x18x12mmDischarge Plug: E-Flight Ultra MicroSuited to the following models: E-flite micros utilizing EFLB2002S25 battery* The nano-core technology in lithium ion batteries is the application of nanometer conductive additives. 1) The nanometer conductive additives form ultrastrong electron-conducting networks in the electrodes which can increase electronic conductivity. 2) These additives create a superstrong ability for imbibition in the carrier liquid to supply more ion channels. This improves the ability of ion transmission and ion diffusion. Through improving electronic conductivity and ion transmission, the impedance is reduced and the polarization of high rate discharge decreases greatly.Advantages over traditional Lipo batteries;-Power density reaches 7.5 kw/kg.-Less Voltage sag during high rate discharge, giving more power under load.-Internal impedance can reach as low as 1.2m compared to that of 3m of a standard Lipoly.-Greater thermal control, pack usually doesnt exceed 60degC-Thickness swelling during heavy load doesnt exceed 5%, compared to 15% of a normal Lipoly during heavy load.-Higher capacity during heavy discharge. More than 90% at 100% C rate.-Fast charge capable, up to 15C on some batteries.-Longer Cycle Life, almost double that of standard lipoly technology.