When batteries are used in series, if the internal resistance of batteries is inconsistent, the terminal voltage of batteries will be inconsistent during charging and discharging, which will eventually lead to the undercharging of batteries and premature failure of batteries. Therefore, on the electric bicycle, the balance consistency of battery packs has a considerable impact on the battery life. For consumers, how to use the battery reasonably will also have a certain impact on the balance and consistency of the battery, thus affecting the service life of the battery. Based on the research and practical use of batteries for many years, it is suggested that consumers use batteries reasonably by the following methods
(1) The speed of electric bicycle is 20-25 km/h.
(2) Riding distance: 10-30 km/day, discharge depth is less than or equal to 70% (every 2 months for a deep discharge).
(3) Charging frequency: once a day.
(4) Load weight: riding alone (one child under 10 years old can be carried).
According to the above method, the better quality electric bicycle can be used for 3-4 years, even 5 years, and the battery can be used for about one and a half years.