What is a Battery?
Contributors:
Shawn Hymel
Shawn Hymel 
Resources and Going Further
By now, you should have an understanding of how batteries were invented and how they work. Batteries are one method of providing electric energy to your project, and they can be incredibly useful if you need a portable power source.
If you would like to more about batteries, here are some other tutorials:
Want to see batteries in action? Take a look at these projects that use different batteries in different configurations:
Simon Splosion Wireless
This is a tutorial demonstrating one of many techniques to "hack" the Simon Says. We will highlight the technique to take your Simon Says Wireless.
Actobotics Basic Differential Platform
Get started with Actobotics with this simple vehicle. Then expand and customize it for your own evil robot empire.
LED Butterfly Pop Up Card
Craft an illuminated butterfly pop up card with copper tape, two LEDs, and a battery.
Photon Remote Temperature Sensor
Learn how to build your own Internet-connect, solar-powered temperature collection station using the Photon from Particle.
ESP8266 Powered Propane Poofer
Learn how Nick Poole built a WiFi controlled fire-cannon using the ESP8266 Thing Dev Board!
Blynk Board Washer/Dryer Alarm
How to configure the Blynk Board and app to notify you when your washer or dryer is done shaking.