There are many models in the market for the customers to choose, and which one is the best to buy? Different people with different opinions, and in my opinion, i recon that the PIPO X10 Pro or the PIPO X12 is the best to buy, for both of them come with the 10000mAh battery and built in a small fan to cool themselves, which is very convenient in our daily lives. You can look them at here in detail: