Power Sources by Emily Short begins here.

"Power Sources provides an implementation of plugs and batteries, and is designed to be used alongside Computers or as a base for other device implementations. It requires Plugs and Sockets by Sean Turner."

• Part 1 - Wall Power
• Part 2 - Battery Power
• Section 1 - Batteries
• Section 2 - Battery Compartments
• Section 3 - Battery-related Understand tricks
• Section 4 - Does the Player Mean rules about batteries and compartments
• Section 5 - Device effects on batteries
• Part 3 - Power and Powerlessness
• Chapter 1 - Powered, Wall-Powered and Unpowered
• Chapter 2 - Refusing to turn on
• Chapter 3 - Warning about failure
• Chapter 4 - Putting out devices
• Chapter 5 - Notifying of full charge