Panasonic has developed a flexible lithium-ion battery with a thickness of only 0.55 mm, or about 0.022 inches. Suitable for use in card-type and wearable devices, this rechargeable battery can retain its
characteristics even after repeatedly bent into a radius of 25 mm or twisted to an angle of 25 degrees.
Card devices, which are often carried in wallets or pockets, require internal components that can withstand bending and twisting. Slim lithium-ion batteries are used in such devices, but these batteries can degrade when they are bent or twisted, resulting in shorter operating time for the devices.
Panasonic’s new flexible battery can withstand bending and twisting beyond the Japanese Industrial Standards for identification cards. When used in card devices such as smart cards and card keys that work on batteries, as well as body worn devices and smart clothing, this battery can retain its characteristics even if the device is frequently bent or twisted.