Have you ever wanted to use a 12 volt power source for a light or accessory on you bike, but found that your water bottle cage couldn't hold it? Well, here is a solution to a common problem us cyclists face. It's also weatherproof.
Step 1: Materials
You will need:
1 bar of aluminium, preferably 1" in width, the lenght will be adjusted to fit your bike
1 hex key or screwdriver, depending on what type of screw is used to fasten the cage to the bike frame.
1 drill bit of the diameter of the screw
1 drill or drill press
a couple of zip ties to hold down the battery(s)