Battery of power bank
Usually the standard imported 18650 battery, the battery lifetime about 500 times, the domestic level A brand big card is same lifetime. But the life of the second-line brand is basically between 300-400 times.
Capacity of power bank
The larger the capacity of the mobile power bank, the longer the total life, because the mobile power bank capacity is usually larger, and the longer it is used after being fully charged, the longer the life is naturally.
Circuit board of power bank
Equivalent to the brain, the mobile power supply with high-quality circuit board is more durable, easy to use, and safer. If it is a mobile power source of inferior circuit board, there are many faults, it is easy to damage the mobile phone, and even there is a danger of explosion.