How to print tiny batteries

3D printing can now be used to print lithium-ion microbatteries the size of a grain of sand. The printed microbatteries could supply electricity to tiny devices in fields from medicine to communications, including many that have lingered on lab benches for lack of a battery small enough to fit the device, yet provide enough stored energy to power them.

These lithium-ion microbatteries are super-chargers

Sometimes good things come in small packages. And sometimes those things are the most powerful batteries on the planet. Researchers at the University of Illinois at Urbana-Champaign have developed a tiny lithium-ion microbattery that leaves larger supercapacitors in the dust.