How long does an electric toothbrush last on a charge?

At present, there are all kinds of electric toothbrushes on the market. Some say they can be used for 25 days, some say they can be used for 35 days, and some say they can be used for 60 days.What makes the difference?

There are several factors that affect this:

1. Capacity of rechargeable lithium battery
They're usually 500mA, 600mA, 800mA, 1,000mA
The larger the capacity, the longer the service life

2. Power consumption of circuit board
The more components on the circuit board, the stronger the function and the more energy it consumes

3. Power consumption of motor
The higher the speed, the less money, the more energy consumption
Usually these three factors together determine the service life, and these three factors ultimately depend on one factor, the price of the product you buy, the higher the price, the higher the configuration.