XP Storage Chest is a chest that stores XP. A simple display for the amount of XP is on the front. Modelled like a chest so it can be placed next to other chests without standing out too much.
Create the XP storage chest like a normal chest with an Emerald in the center.
Click the chest to put XP in. Click while sneaking to take XP out.
Breaking the chest releases an XP orb with the value of all stored XP.
How to install:
For Minecraft 1.6.2
For Minecraft 1.7.2