Hand Cranked Backup Power for Smartphones

The Et贸n BoostTurbine聽is a rechargeable backup battery pack for smartphone聽devices that is charged by a hand crank generator. One minute of winding provides聽enough power for a quick phone call. The device is wrapped in a light but strong aluminum housing to keep it聽protected聽during traveling, and it comes with a standard USB and microUSB ports for… Continue reading Hand Cranked Backup Power for Smartphones