How to Make a Battery Hand Warmer

First get a nine volt battery.then get a paperclip and electric tape cove the paperclip with the tape when the paperclip is straight.then bend the paperclip to fit in each whole at the top of the battery.next tape one of ends of the paperclip to one of the battery wholes. Last when you want the battery to heat up just hold the end of the paperclip that is not taped to the battery in the other battery whole and pretty soon it should heat up!