The guides walk you through the process of converting your battery-sucking gadgets to use AC power. Both guides require rolling up your sleeves, ripping the gadget apart, and doing some soldering—if using a soldering iron is new to you, LiffeHacker’ve got a beginner’s guide to help you out.
The first guide covers in detail how to use a switch, some wire, and an old cell phone charger to convert a baby swing to use AC power, and the second guide is a more broad, general overview of how to modify devices—but isn’t quite as detailed. If you’ve got any personal experience in modifying gadgets to use AC power instead of batteries.