RocketBox

Hey everyone - new to this forum and new owner of an ebike. I picked up a 2009 Kilowattbikes cruiser bike yesterday. Its in great condition, doesn't even look like it's been ridden actually and the price was great ($50 at a thrift store). The only problem with it is that it doesn't have a battery storage unit. I'm wondering if someone could perhaps point me in the right direction for this? Can i get a plug and play battery box for this? Would i be better off just getting something similar that fist in this space and just wire in the positive and negative wires to the connection this runs to before it enters the frame?

i have pics, but since i'm new, i can't attach images to a post until i have 10 posts.
Any help would be much appreciated!

Elvo

Lithium Magnesium battery. Probably custom made. My suggestion is to take it to a local ebike shop and have them take a look.