Extra juice for your phone when you need it most! Mighty Minis look like little action figures, but they're actually chargers that run off of standard AA batteries (not included). They give you that extra juice when you need it, just enough to tide you over until you get back to a proper charger. Keep one on your keychain. Keep it on your laptop bag. Keep it handy and just when you think all hope is lost, you'll have up to 3 extra hours of battery life in your pocket. Each Mighty Mini features an on/off switch to prevent accidental drain and includes a handy bag strap. Not intended for large mobile devices and tablets. Dimensions: almost 4" tall x 2 1/2" wide x 2 1/2" deep.