After extensively researching the latest battery technologies and eventually accepting economic realty, I came up with three right-sized and right-priced battery packs for my various EZ-B projects. Introducing:

EZ-Battery SLIM  :  7.4V 2000mAh  |  Li-Ion Polymer  |  65mm x 51mm x 13mm  |  2.8 Oz

EZ-Battery CHUNKY  :  7.4V 3000mAh  |  Li-Ion Polymer  |  67mm x 37mm x 30mm  |  4.2 Oz

EZ-Battery PUDDIN'  :  7.4V 8.0Ah  |  LiMnNi  |  114mm x 30mm x 75mm  |  0.9 Lb

These are simply Powerizer battery packs I altered by soldering on my own barrel connectors and wrapping with vinyl tape. Little WALL-E and Scorponic use the SLIM, Big WALL-E the CHUNKY and Vanilla Ice gets the PUDDIN'. It took a long time to find the right battery for the Omnibot project - the PUDDIN' fits perfectly in his battery compartment and at 8.0Ah it's not too shabby...

The EZ-Battery Line-up

SLIM | CHUNKY | PUDDIN'

EZ-Bs All Around

Praise the Mother!