Step 5Hooking up the switch and battery
2) Attach some electric tape to the black wire of the usb cable
3) stick the black wire to the '-' side of the battery, using the electric tape.
4) strip the ends off a short piece of wire. bend one end of the wire and place over the '+' side of the battery.
5) Cover with the same piece of tape used in step 3 and press firmly to make sure that there is a good contact between the wires and the battery terminals.
6) Solder the other end of the wire (now connected to the battery's '+' terminal) to the other terminal of the switch used in step 1
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