When it comes to ports, you should know that the newest standard is the USB type C port, which, in time, will replace the older USB type A and micro USB ports. So our advice is to look for power banks that are based primarily around USB type C ports. You can see a selection of such power banks here. Besides the. Another important feature you should take into consideration when looking for a new power bank is its charging (aka recharging) time. Needless to say, the faster a power bank. When it comes to portability you'll need to consider two aspects: weight and volume. They are both generally directly proportional to the device's capacity. Thus, the more mAh a power bank has, the heavier and bulkier it tends to be. So if you want an ultra-slim. Of course, power banks have a lot of different features which can be very important, depending on your needs. Here are some of the ones that might be of interest: 1. Pass-through charging: the capability of the power bank to charge one or more other. In terms of price, you can expect to pay anywhere between $20 and $50 dollars for an average power bank. Premium models can reach well over $100, especially if they come with wall chargers. On the lower end of the scale, you can find power banks as cheap as $10, but.