The battery of ack belt does not need to be replaced. When the battery is dead, you can charge it with the charger that comes with your belt.

The correct way to wear the belt:

1. Wear a belt when lying flat. First, put the belt behind our waist, then adjust the distance between the two sides of the belt, and finally tie the belt.

2. Wear a belt when standing, first keep the waist straight, then wrap the belt around the waist, then adjust the distance on both sides of the belt, and finally tie the belt.

Our waist is very fragile and needs careful care. The belt is a protective device for the waist, which can effectively protect our waist and keep warm.