THE BEST SIDE OF BEST PORTABLE POWER BANK

5W, and that is half the wattage a MagSafe iPhone is able to managing. Which was not problem, because this is the power bank which can keep on with your cell phone for some time, so velocity won't be in the essence. The massive problem with a power bank is forgetting to stow it with your backpack. Even when you get that right, did you remember to