Information from:the Internet posted on:2019-11-29
The memory effect of the rechargeable battery. When the memory effect gradually accumulates, the actual use capacity of the battery will be greatly reduced. An effective way to reduce the negative effects of memory effects is to discharge. Generally speaking, because the memory effect of nickel-cadmium batteries is relatively obvious, it is recommended to make a discharge after 5-10 times of repeated charging, and the memory effect of nickel-hydrogen batteries is not obvious. 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 with the sufficient power. Generally fluctuates between 1V-1.4V, because the battery of different brands is different in process, the voltage fluctuation range is not completely the same.
To discharge the battery is to use a small discharge current, so that the battery voltage slowly drops to 0.9V-1V, you should stop discharging. Discharging the battery below 0.9V will cause excessive discharge and irreversible damage to the battery. The rechargeable battery is not suitable for use in the remote control of home appliances because the remote control uses a small current and is placed in the remote control for a long time It 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 it is found that the battery capacity has decreased, it is best to make a discharge.
A convenient way to discharge the battery yourself is to connect a small electric bead as a load, but you must use an electricity meter to monitor the change in voltage to prevent over-discharge.
Whether to choose a fast charger or a slow constant current charger depends on the focus of your use. For example, friends who often use digital cameras and other equipment should choose fast chargers. Do not place the mobile phone charger in humid or high temperature conditions. This will reduce the life of the mobile phone charger.
During the process of the charger, there will be a certain amount of heating. 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. Because the style and charging time of the mobile phone are inconsistent, this has nothing to do with the charging performance of the mobile phone charger.
For battery capacity, see the label on the outside of the battery, and for charging current, see the input current on the charger.
1. When the charging current is less than or equal to 5% of the battery capacity:
Charging time (hours) = battery capacity (mAH) × 1.6 ÷ charging current (mA)
2. When the charging current is greater than 5% and less than or equal to 10% of the battery capacity:
Charging time (hours) = battery capacity (mAH) × 1.5 ÷ charging current (mA)
3. When the charging current is greater than 10% of the battery capacity and less than or equal to 15%:
Charging time (hours) = battery capacity (mAH) × 1.3 ÷ charging current (mA
4. When the charging current is greater than 15% of the battery capacity and less than or equal to 20%:
Charging time (hours) = battery capacity (mAH) × 1.2 ÷ charging current (mA)
5. When the charging current is greater than 20% of the battery capacity:
Charging time (hours) = battery capacity (mAH) × 1.1 ÷ charging current (mA)