These portable power banks can very easily be carried around for the user's convenience.
'Life Card' portable power banks, designed by PlusUs Studio, feature a thin design that is comparable in size to a credit or debit card. The power bank is silver and rectangular in shape and can easily fit into the user's wallet or cardholder. When needed, the power bank has a small retractable cord that can be plugged into the user's phone. The Life Card charges the phone and when it's finished, it can once again be stored away easily.
These card-sized power banks are extremely convenient -- especially for people who do not often carry around purses, backpacks or large bags that can store over-sized power banks or charging cables.