CyberPower OLS3S15KE User Manual page 3

8. Battery Maintenance ....................................................................................... 34
8.1. Replacement and Disposal of Batteries ................................................... 34
8.2. Easy for Battery Replacement .................................................................. 35
9. Communication Port ....................................................................................... 37
9.1. USB Interface ........................................................................................... 37
9.2. Dry contact Interface(optional) ................................................................. 37
9.3. RS232 Interface ....................................................................................... 37
9.4. Intelligent slot ........................................................................................... 37