Eton's new metal-clad BoostTurbine2000 ($59) is disproportionately large for its battery capacity, but there's a reason for that: the 2000mAh charger has a hand turbine power generator built-in. In addition to charging through the Micro-USB port, it can be juiced up by manual cranking. The company says you'll get about 30 seconds of talk time from one minute of turning the handle, enough for emergency calls or texts, or more if you're looking for…
