There are all sorts of devices that provide a quick charge for a cell phone or other gadget when you can't get to an electrical outlet. Most, like the Energizer Energi To Go products, require you to insert AA batteries that transfer energy from the AA battery to the device's internal battery. But Easy Energy has a battery-free solution.
Spokeswoman Allison Morrison told me about the company's YoGen product, which is like a yo-yo that generates power. It's a handheld device with a cord. Pull the cord a few times and it generates enough power to … Read more