I recently bought a power bank at Walmart for 15$. I am wondering if its any good or i could have bought one for a better deal. Here are features Capacity, Input: DC 5.0V-1A, Output: 5.0V-2.1A. It comes with a light feature and a battery power indicator.
The value is based on the size (capacity) of the battery in the device. Small ones are typically around two Amp-Hour, the big ones 10 - 12 AH. Prices vary tremendously and retail stores tend to be more expensive than buying online. If it's around 2 - 3AH (2000 - 3000 mAH) or more it's not a bad deal.
