Juice up your phone off the grid with these solar, wind, bike, crank and heat mobile chargers
The Etón BoostTurbine 2000 is built specifically for charging smartphones, and has a 2,000 mAh lithium battery inside, which you can keep charged as a spare to top off your handset, or handcrank the BoostTurbine for just one minute with the sturdy handle to get a 30 second call or a few text messages out. There is a regular USB port, a microUSB one, and LED indicators for the charging state.
The big difference between the SunVolt duo and some other solar charging systems so far is its efficiency and charging speed. The company claims that, on a sunny day, it will charge your phone as fast as a wall outlet, making it ideal for camping, beach, hikes and so on.
The solar chargers are light, come with a water-resistant case, and can be set up in minutes. The difference between the regular version, which is $99.95, and the MAX one, which is $129.95, is the larger solar panel, which charges things 50% faster. All in all, a pretty decent price to pay for juicing up off the grid.
The output generated is about 2 watts, which is pretty adequate and about 20 minutes of dinner-cooking with hot fire will provide an hour of 2G talk time on a phone like the 4S, for example, says the BioLite Stove maker. The thing weighs 33 oz (935 grams), so it's not too bad to lug around while hiking.
Granted, you shouldn't expect wonders from the wind and solar input when it comes to topping it off, but for emergency situations the combination of two is not something you see in a mobile charger every day. The K3 makers claim one hour of charge in the sun and wind will get you 30 minutes of talk time, which is pretty good.
Monocrystalline solar cells on quality backpacks don't come cheap, and that's precisely what the SunnyBag Smart Voyager is offering. The company has the solar panel attached to a number of trendy-looking gear, too - from messenger bags, to expensive leather endeavors for the business crowd.