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Universal bike light battery

Step 6Drill two holes

Drill two holes
Solder lead wires to the connectors. I recommend installing braided 18 AWG wire as opposed to 20 or 22. The 18 AWG will reduce resistance from the batteries to your light and result in better light output. Use heat shrink tubing to prevent short-circuits.
Drill two holes in the bottom of the container. The size of the holes depend on the connectors you are using. Feed the leads wires and connectors into the container and secure with a nut from the inside. Long needle-nose pliers may come in handy when tightening the nut.
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