unfortunately for me, it feels like mine chargers longer than I expected. So far it takes me 36 mins to charge 10% on my nexus with screen on standbye and wifi turned on. That equates to an even 6 hours to fully charge my device. A little too long compared to some of the devices I've had in the past (I must admit that they're all Apple products; Macbook Air, Macbook Pro, iPhone 4, iPhone 4S, iPad 2, iPad 3), they all charge to 100% in less than 4 hours. Maybe I'm not used to micro USB chargers yet.