In a crisis situation, without power, batteries are clearly going to be in short supply. Being able to see in the dark is a critical factor for improving your survival situation.
Fortunately, there are several varities of flashlights which require no batteries. Some of them are so inexpensive that they are given away for free with the purchase of other items.
First, there is the shake type. These are ridiculously inexpensive. One model sells for $3.00. Amazon also offers three of these flashlights, in different sizes, for $17.00. Add another item for $9.00 or more, and you get free shipping too. Have a few of these lights in your emergency supplies and/or around the house.
There is also the "dynamo", or "hand-crank" type. These often have other features- a built-in AM radio, strobe, even a cell phone charger. Many of these lights sell for under $25. Device charging options include a set of universal jacks, such as this model; or a USB charger jack like this one (for charging numerous devices); or a universal 12V adapter, like this model (for powering a variety of 12V DC devices). Check the manufacturer's websites to see if the model you want to buy is compatible with your cell phones and other devices.
Having the ability to see in the dark, stay in communication, power some of your devices, and obtain public information from the authorities, all without the need for batteries, is a tremendous advantage in a crisis situation.
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