I received the Elive Buy Power Bank , in exchange for honest review from Tomoson. The power bank charges 2 devices at the same time. It also has a built in light. The bank is heavier than other power banks, I have used before. It's heavier than my external hard drive for the computer.
The power bank also has a built in indicator, which shows you how much power you have left.
I haven't had any issues with the product since receiving it. The powerbank is great for my bigger devices, such as the kindle or even my phone, if I am charging it over night.
Similar to any power bank, you need to charge it first. You can check the indicator lights to determine how much charge you have left. 4 lights means it is fully charged.