VaporGalaxy 5v Box Mod   3xAA sized box uses two 14500 batteries (sold seperately) which will supply 900mah of battery life.   Small compact size is easy to carry and use. Regulated at 5Volts.  

Features:

Black Horn switch.

Black 3xAA Battery box Sealed 510 Connector

Master On/Off switch

Epoxy reinforced connector and switch area

3mm Changing LED  

Low resistance atomizers are not recommended for use at above 3.7 volts. 

The Batteries needed for these box mods are here

http://www.vaporgalaxy.com/UltraFire-LC14500-Protected-37-Volt-900mAh-Li-ON-Battery-LC14500.htm

IMR High Drain Batteries will not work in these boxes because of the flat top nature of the IMR High Drain batteries. Will work with small magnetic battery spacres if you want to use the IMR High Drains.

Measures : 3 and 1/4 inch tall, 1 inch deep (at its thickest point at the button) and 2 inches wide.