I have discovered something great! Think of all the times your calculator was dead when you needed it in the eighth grade. Think of all the times you needed to call someone only to find your phone has died. Think of all the times, when you were battling a legendary and your Game Boy dies. Now you can fix that, with no more than you body and your head. Press the negative side of the battery onto your forehead. The longer you do it, the more your battery will recharge*. I did this twice, one with my calculator and once with my phone. Try it! *Takes a long time. About 1% per five minutes.