Lithium battery is a durable product. It does not need to be equipped with an expensive original charger. Generally, a brand-name ordinary charger can be used, eliminating the need to rely on mobile phones for direct charging. There are fast charging (about 2-3 hours) and slow charging (around 10 hours). If you have more batteries, choose fast charging is better. In addition, due to the characteristics of lithium batteries, discharge and overcharge operations are not required. The battery life depends entirely on the effective charging time. In other words, even if you use only half of it to start charging, there is no impact on battery life.
1. Memory effect.
The battery memory effect refers to the reversible failure of the battery, that is, the performance of the battery can be restored after failure. The memory effect means that the battery automatically maintains this specific tendency after a long period of time under a specific working cycle. This was first defined in nickel-cadmium batteries. Nickel-cadmium pouch batteries do not have a memory effect, and sintered batteries have a memory effect. Nickel metal hydrogen (commonly known as nickel-metal hydride) batteries are not constrained by this memory effect definition.
Recommendation 1: It is not necessary to discharge the battery before each charge, and it is harmful, because the service life of the battery is shortened needlessly.
Recommendation 2: It is not advisable to use a resistor to connect the positive and negative electrodes of the battery to discharge, the current cannot be controlled, it is easy to over-load to 0V, and even the polarity of the battery of the series battery pack is reversed.
2. The battery needs to be activated.
The lithium-ion battery undergoes the following process before leaving the factory:
the lithium-ion battery is infused with electrolyte—sealed—formed, that is, constant voltage charging, and then discharging, so several cycles are carried out, so that the electrode fully wets the electrolyte , Fully activated, until the capacity reaches the requirements, this is the activation process-capacity division, is to test the capacity of the battery to select batteries of different performance (capacity) to classify, classify the battery level, and perform capacity matching. The ion battery is already activated in the user's hands.
The battery will be delivered a long time from the factory to the user, ranging from 1 month to half a year. At this time, because the battery electrode material will be passivated, the manufacturer recommends that the battery used for the first time should be 3- 5 times of full charge and discharge process in order to eliminate the passivation of the electrode material and reach the maximum capacity.
3. The first three times do not need to be charged for 12 hours. The early nickel-metal hydride batteries for mobile phones need to be replenished and trickle-charged. It may take about 5 hours to reach the perfect full state, but it does not need 12 hours. The constant-current and constant-voltage charging characteristics of the lithium-ion battery determine that its deep charging time does not require 12 hours.
4. Does the rechargeable battery have the best condition? The nickel-based battery has the best condition, generally reaching its maximum capacity between 100-200 cycles. For liquid lithium-ion batteries, there is no such hump phenomenon of cycle capacity. Lithium ion batteries are not in the best condition.
5. The larger the charging current, the faster the charging? For the charging of lithium-ion batteries, within a certain current range (1.5C-0.5C), increasing the constant current value of the constant current and constant voltage charging method does not shorten the charge.