Solar Necklace T-Shirt

Step 6 Battery pouch

The battery pouch is not necessary. The idea is that it can replace the solar cell on cloudy days. Simply hook it onto the hooks at the end of capacitor necklace module, where the solar cell normally hangs. Of course you can also directly connect it to the motor, the battery current does not have to pass the capacitor and amplification circuit.

Cut two rectangles of neoprene the diameter of your button battery and about 1 cm higher. Round the corners. Fuse a strip of conductive fabric to either side, diagonally so that they will only cross in the center when you lay them on top of each other facing each other. Because one side (the minus pole) of the button battery is rounded around the edge, it might end up touching both sides and this is why you want to isolate the conductive strip that will be touching the plus pole in this area. See photos.

Using conductive thread, sew two loops to the ends of each piece of conductive fabric so that they will stick out and can be attached to the same hooks that otherwise hold the solar cell. You can either make the loops yourself by winding some hook-up wire around your pliers and soldering them or otherwise buy some.

Sew the pouch together. If you like you can mark the plus side. In my case with a red bead.