Power banks can be extremely useful for those times when you don't have your charger on you, or when you simply can't find a power outlet to plug it into. The challenge can be trying to decide on the perfect size to meet your needs. One solution can be just to buy the biggest power bank out there, but those can end being a bit costly. These deals on original Xiaomi power banks though can provide varying levels of battery capacity for relatively little cost compared to some of the other options out there. The power banks come in a sliver finish so they as stylish as they are functional, and there are three size options starting at $13.99 for the 5200mAh model, then jumping up to $15.99 for the 10400mAh model, and finally for anyone needing a ton of power for multiple devices, you can pick up the 16000mAh model for $17.99.