Have a quick glance at the key features of the Lenovo power bank PB4 10 5000mAh Silver -88016288. The vital attribute associated to a power bank is its capacity, which is measured in milli Ampere Hour. This Lenovo power bank has a capacity of 5000mAh that can fully charge 2 phones simultaneously. The device comes with an over charging protection that will protect your gadget from all types of dangers. Since it is lightweight, you can carry it wherever you want to. The super slim design of this power bank is an added benefit, and the silver finish of the power bank makes it more appealing.