The memory effect of rechargeable batteries, when the memory effect gradually accumulates, will cause the actual use capacity of the battery to drop significantly. To mitigate the negative effects of the memory effect, an effective way is to discharge. Generally speaking, because the memory effect of nickel-cadmium batteries is more obvious, it is recommended to make a discharge after repeated charging and use of 5-10 times, while the memory effect of nickel-metal hydride batteries is not obvious, and a discharge can be made after repeated charging and use of 20-30 times.
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 depending on whether the power is sufficient. Generally, it fluctuates between 1V-1.4V, and different brands of batteries are not exactly the same due to different processes.
Discharging the battery is to use a small discharge current, so that the voltage of the battery slowly drops, falling to between 0.9V-1V, and the discharge should be stopped. Discharging the battery below 0.9V will cause excessive discharge, so that the battery is irreversible damage, rechargeable batteries are not suitable for use in home appliance remote controls, is because the use of the remote control current is very small, long-term use in the remote control is easy to cause excessive discharge. After a correct discharge of the battery, the capacity of the battery returns to the original level, so when the capacity of the battery is found to have decreased, it is best to make a discharge.
An easy way to discharge the battery yourself is to connect a small bead as a load, but you must use a meter to monitor the change in voltage value to prevent over-discharge.
For choosing 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 devices such as digital cameras should choose fast chargers. Do not place the mobile phone charger in wet or high temperature conditions, which will reduce the service life of the mobile phone charger.
In the process of the charger, there will be a certain heating phenomenon, at normal room temperature, as long as it does not exceed 60 degrees Celsius, it is a normal display that 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.
