Modular Battery dispenser for pegboards (to suit AA batteries)

(AAA version can be found here: http://www.thingiverse.com/thing:2178293)

Inspired by LarNil's design:
http://www.thingiverse.com/thing:605854
and pegboard connection pins from Saadli's dispenser:
http://www.thingiverse.com/thing:495871

Modular in design, it fits pegboard using a 1" hole pattern and ~4.6dia holes (standard pegboard).
The base unit holds 18 AA batteries and the extension 16 each.
Add as many extensions as required.
The top can be capped to finish it off, if desired.