The Rock 270w Mini V-lock battery is perfect for powering monitors or those days on location where you can't re charge. They are 40% smaller than most V-lock batteries of a similar power.
Compatible with any V-mount system and has a d-tap and USB-A outputs built in.
 
Specifications
 
14.8V
18600mAH
270W
15A
USB: 5V 2A
1300G
120x91x90mm