Battery self-discharge
Even if the power bank is not in use, its battery will self-discharge. Long-term idleness will cause the battery to gradually deplete. Excessive discharge may cause irreversible changes in the chemical structure of the battery, reduce the battery capacity, and shorten the overall endurance of the power bank.
Electrode material aging
Battery electrode materials will gradually age during long-term idleness. A passivation film may form on the electrode surface, which will hinder the transmission of ions inside the battery and increase the internal resistance of the battery, resulting in severe heating during charging and slow charging speed. It will also make the output voltage of the power bank unstable during discharge.
Electrolyte drying up
The electrolyte inside the power bank may dry up during long-term storage. This will cause poor ion conduction inside the battery, further increase the internal resistance of the battery, affect the battery's charge and discharge performance, and may even cause the battery to fail to charge and discharge normally.
Battery bulging
If the power bank is idle for a long time and the battery management system is not perfect, the battery may be over-discharged or over-charged, resulting in battery bulging. The bulging battery will not only deform the power bank shell, but also may pose safety hazards, such as leakage, short circuit and even explosion.
Damage to circuit board components
The circuit board components inside the power bank may be damaged due to moisture, oxidation and other factors during long-term idleness. For example, the capacitor may leak and reduce capacity, affecting the output stability and conversion efficiency of the power bank.
Power management system failure
The power management system is one of the core components of the power bank. Long-term idleness may cause its software to fail or hardware to age. This will affect the power bank's charge and discharge management of the battery, such as the inability to accurately display the power level and the failure of the charging protection function.
Overall performance degradation
Taking the above factors into consideration, the overall performance of the power bank will be greatly reduced after long-term idleness, including slower charging speed, reduced battery life, unstable output voltage, reduced safety performance, etc., which seriously affects the user experience and the service life of the power bank.
