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
