Are you always losing your phone? Why not get a blood powered tattoo phone?

Jim Mielke has come up with a novel solution that pushes the boundaries of Bluetooth technology and good taste.

The Digital Tattoo Interface is invisible when not in use and is activated by pushing a small dot on your arm. The tattoo includes video display, callerID and numeric keypad and once a call is complete you simply push the same activation button and it vanishes once more.

The phone is powered by a coin-sized blood fuel cell that contains a glucose and oxygen converter and is implanted directly into your arm. So when your phone carrier isn’t bleeding you dry at least your phone is chipping in.

When not being used for its phone capability the implant also monitors your health and well being, probably quite handy given that you have just tattooed a phone on your arm.