... efficiency: over 85%, good charging performance.rapid charging your phone safely and efficiently in approximately 3 hours without orvercharging ... prevents overcharging and short circuit. 5. Micro and Mini USB interface6: Best replacement for the original charger.Usage guide: ... iPhone, Blackberry, HTC, iPad and other brands, Such as USB adaptors, Car Chargers, Travle chargers, Dock stations, Car mount ...