Printed power

2019-03-05 12:01:02

By Ian Sample EVER noticed how gadgets like cellphones can nearly double in size and weight once you slap on a battery pack? Little wonder then that shrinking the size of batteries is a major preoccupation—which is where a new tool called a “laser typewriter” comes in. It can print tiny batteries directly onto electronic circuits. The problem with big power sources is most acute in the smallest devices. “As you go smaller, space becomes a premium. It’s like real estate in Tokyo—it’s a really hot commodity,