Powerhobby 1S 3.7V 250Mah 45C Lipo Battery 4 Pack 

This 4-pack of single-cell 250mAh 45C battery packs is perfect for the Blade mCX/mSR/Ncano CP S / Inductrix. These batteries are plug-and-play compatible with both the helicopter and the stock charger. 45C continuous discharge rate of 4 amps.
These batteries are also ideal for the ParkZone Vapor, Micro Citabria, Cessna 210, Ember, and the Parkzone Sukhoi among other micro planes.

Specs:
Length : 45mm
Width : 12mm
Hight: 6mm
Weight 5g (0.18 OZ)

Includes: 4 Batteries

Fits: But not Limted To

Blade Nano CP X

Blade Inductrix (Regualr and FPV)

E-Flite Blade mSR
E-Flite Blade mCX
E-Flite Blade mCX S300
E-Flite Blade mCX2
Force FHX Helicopter
Force MH-35 Helicopter
ParkZone Sukhoi Su-26m
ParkZone Ultra Micro P-51
ParkZone Ultra Micro J-3 Cub
ParkZone Ultra-Micro T-28 Trojan
ParkZone Night Vapor
ParkZone Ember-2

E-Flite Extra 300 3D
E-Flite Ultra-Micro 4-Site
HobbyZone Champ
ParkZone Sukhoi SU-26xp
ParkZone Ultra Micro F4U Corsair