A safeguard circuit breaker must be installed upstream and downstream, and be without problems accessible.
1)Under no circumstances install the UPS near liquids or in an excessively damp environment.
2)Never let a liquid or foreign body penetrate inside the UPS.
3)Never obstruct the ventilation grates of the UPS.
4)Never expose the UPS to direct sunlight or a source of heat.
5)When replacing battery cells, use the identical type and number of cells.