The Ultimate Household/Emergency Flashlight System

Step 7: Test the Flashlight

First, charge the batteries using a normal charger, then put them in the flashlight and push the button. If it turns on, yay! Push it again to turn it off. If it doesn't work, check it with a multimeter and/or look over the connections. Is the LED in backwards?

Now, plug the flashlight into the base, making sure you put the connector in the right way. The LED on the flashlight should come on (dimmer than normal, that was intended to save battery for when the power goes out) because the base is unplugged. Plug in the base and it should turn off. Yay, everything should be working! If this doesn't work but the flashlight does, compare your board against the schematic.