Step 9: Extending the Switch
As I built the case, the switch that changes the battery pack from charging mode to discharging mode did not extend past the aluminum casing, and therefore could not be switched. To fix this, and make the switch look nicer, I made an extension for the switch out of a thin rod of stainless steel I had lying around. I drilled a small hole in the plastic sliding bit of the DPDT switch, and inserted a short length of the stainless steel rod into it. The bit of stainless steel extends past the aluminum housing, and lets the user actuate the switch.