1. Polluted by dirt;
2. When charging the ups battery, add excessive current, which will burst the battery and greatly shorten the service life of the battery;
3. The deformation of the electrode plate causes the positive plate and the wrapped plate to contact each other, resulting in a short circuit;
4. Dirt is deposited on the upper part of the electrode plate and the next step, causing a short circuit;
5. Excessive discharge, the discharge protection circuit of UPS power supply is abnormal, and the load of UPS power supply is too small, resulting in deep battery discharge;
6. The battery is stored for a long time, and it is not charged during storage, so the battery will fail if it is not used for a long time;
7. Charge with unqualified chargers, some of which have no current limiting device, resulting in battery damage;
8. There is no electrolyte, which has been used for a long time, and the electrolyte should be supplemented once a year;
9. The specific gravity of electrolyte is too high;
