Keeping batteries on hand can be a pain. Even the rechargeable ones give you a limited number of recharges. Recently the market has been flooded with shake or wind up devices such as the shake flashlight. Low powered devices such as LED lights and radios can take advantage of the small voltage and amperage that a manual shake or wind up can supply. These types of gadgets aren’t just for gadget-lovers – they should be part of your survival kit.
I was given the Brookstone Shake Flashlight as a gift a few years ago when this technology first arrived on the scene. The light has two settings and two LEDs which allow you to run the light using one LED that is powered by the electromagnetism when you shake the device and a battery cartridge that accepts three AA batteries to give you a full powered flashlight. Five to ten minutes of shaking the flashlight will give you plenty of light to see in the dark. It’s really cool how the shake flashlight works. The inside of the light has an induction coil with a neodymium magnet that slides through the coil when you shake it, generating electricity. LEDs can work on very small voltage and amperage so giving it a few shakes inducts the coil with plenty of energy to burn it.
Being shake flashlights have been on the market for a while, they are probably better now than the one I own and more compact. You can now find wind up radios with LEDs built into them, but sometimes you just want a flashlight and not a bulky radio – but that’s another option if you want both. Regardless of your choice, you should consider buying one before you get caught in the dark without batteries.