World No.1 Quick Charging Brand, premium build quality, great 18 Month warranty and worry-free post-sale service. Dual-USB output charges two devices at once, one for normal smartphone + one port for Fast Charge compatible devices. Powerful and portable 16,000 mAh of battery juice gives 4 – 6 full charges for iPhone, Android, and Windows smartphones, 1 -2 charge for tablet devices. Multiple built-in protection professional electrician safeguards against current surge, overcharging and overheating for safer charging experience.