Nowadays our gadgets are becoming increasingly smaller and lighter so that they can easily be carried in our pockets.For example, mobile phones, which were earlier on quite cumbersome and bulky are now smart (thus called smart-phones). However, with enhanced smart-phones as well as an enormous boost of their usage comes also the necessity to charge them all the time. Thereby, many firms have started introducing power banks onto the market. Genstattu is also release 10400mAh power banks. Today we will give some warm tips when you buy power bank, you should to know three things.