I found a use for ecig batteries and the usb charge port. I don't smoke them, but I find them everywhere and they have some very nice batteries

A neat idea especially if salvaged from lost or discarded vapour-sticks; but won't they be standard types and sizes of rechargeable cells anyway?

[You had me puzzled for a few moments: I do not smoke anything and was trying to work out what ECIG stands for, until I twigged inserting the hyphen! :-) ]