The PowerGrid is the perfect prescription for all you portable battery needs. Right out the box, the PowerGrid comes up to 80% charged and ready to use anytime, anywhere. Utilizing your device’s USB charging cable, the PowerGrid is compatible with almost all USB devices including iPhones, iPods, Samsung Galaxy, Android & Windows phones, and much more. The PowerGrid has five built in LED lights that indicate charge status and power levels, but only illuminate when the power button is pressed. The PowerGrid has an incredibly durable and lightweight design which makes it a perfect solution for all your portable power needs.