S820E Microwave Site Master™ User Guide : Battery Replacement : Site Master Battery
 
Site Master Battery
The battery that is supplied with the Site Master may need charging before use. The battery can be charged using either the AC‑DC Adapter or the DC adapter. Refer to Figure: Status Tool Bar Icons for a description of battery symbols.
Note 
Use only Anritsu Company approved batteries, adapters, and chargers with this instrument.
Pressing the battery icon displays the current battery information (Figure: Battery Information). Press Esc to clear the message.
Battery Information