Panasonic unveils pin-sized battery for wearables

Power-sipping wearable devices could become smaller with a new rechargeable battery from Panasonic. The electronics maker on Friday announced a “pin-shaped” lithium-ion battery that’s 20 millimeters long with a diameter of 3.5 mm, about one-twentieth the size of AAA batteries. Panasonic said it’s the smallest in the industry in terms of capacity by volume. The CG-320 battery has