Backpack recommendations for Bionx battery?
 

I have a Bionx battery for my electric I want to conceal in a backpack on a certain section of my route and am looking for recommendations.

This is the battery I have:

http://www.bionxuk.com/communities/9...4601478478.jpg

But when I store it in my merrill backpack it looks massive, like I'm going camping for a week, and the weight pulls my pack to one side uncomfortably.

Anyone know of a good way (or type of pack) I can conceal the battery (in) comfortably and inconspicuously while riding and not in use?

For various reasons I don't want to advertise I'm on an electric bike. thanks.

A frame mounted pack is the only feasible solution that I can perceive (insulate it well). "Age old" problem until batteries get smaller. Luna Cycle has a small brick that supplies 52V, 7 a/h and C58 has a diminutive em3ev that he had built, but BionX batteries are necessary for their systems.

Thanks. I just hit upon an idea, though: A hard shell back pack. That might work.

Why do you want to conceal the battery?