The FULLSEND 1S HV 4.35V 450mAh 95C Lipo Battery comes in a very lightweight and very compact size. The long shape of this battery makes it works best on Baby Nazgul 73MM.

The Lipo will just fit into the iFlight Baby Nazgul 73MM. Using this battery will give you a significant increase in flight time as well as a bit more power over the stock battery.