If you want to charge your smartphone, on the go then buy all new Mi 10000mAh Power Bank 3i. It's extremely light in weight and small in size, you can take it anywhere hassle-free. Its smart power management will allow you to manage where the power will go more and where less. It has a two-way fast charging feature, and two types of USB output and they are Type C and Micro USB. It has 12-layer circuit protection as well, for protecting yourself from any type of uncertainty. And lastly, its blue color and unique design make this power bank look even more attractive.