The memory effect of the rechargeable battery, when the memory effect gradually accumulates, the actual use capacity of the battery will be greatly reduced. To alleviate the negative effects of the memory effect, an effective method is to discharge. Generally speaking, since the memory effect of Ni-Cd batteries is more obvious, it is recommended to discharge once after 5-10 times of repeated charging and use. However, the memory effect of Ni-MH batteries is not obvious and can be used after 20-30 times of repeated charging. One discharge.
The nominal voltage of nickel-cadmium batteries and nickel-metal hydride batteries is 1.2V, but in fact, the voltage of the battery is a variable value, which fluctuates around 1.2V as the power is sufficient. Generally, it fluctuates between 1V-1.4V. The voltage fluctuation range of batteries of different brands is not completely the same due to the difference in technology.
Discharging the battery is to use a very small discharge current to slowly decrease the battery voltage to between 0.9V-1V, and then the discharge should be stopped. Discharging the battery below 0.9V will cause over-discharge and irreversible damage to the battery. Rechargeable batteries are not suitable for use in home appliance remote controls, because the remote control uses very little current and is left in the remote control for a long time. Use can easily cause excessive discharge. After a correct discharge of the battery, the capacity of the battery is restored to its original level, so when the battery capacity is found to have declined, it is better to perform a discharge.
An easy way to discharge the battery yourself is to connect a small electric bead as a load, but you must use an electric meter to monitor the voltage change to prevent over-discharge.
Whether to choose a fast charger or a slow constant current charger, it mainly depends on the focus of your use. For example, friends who often go out to use digital cameras and other equipment should choose fast chargers. Do not place the mobile phone charger in humid or high temperature conditions, so as to reduce the service life of the mobile phone charger.
In the process of the charger, there will be a certain amount of heat. At normal room temperature, as long as it does not exceed 60 degrees Celsius, it is a normal display and will not damage the battery. Since the style of the mobile phone and the charging time are inconsistent, this has nothing to do with the charging performance of the charger of the mobile phone.