The wrist ball usually uses a small lithium battery. When the battery is exhausted, it is necessary to replace the old battery with a new battery to ensure the normal use of the wrist ball.

Wrist ball is the abbreviation of wrist fitness ball, also known as power ball, magic ball, gyro ball and super gyro. It was invented in Taiwan Province Province, China, which is common in Taiwan Province Province, and then spread to Europe and America, and promoted all over the world.