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Anritsu FAQs

My MS2721B has a fully charged battery. When I unplug it from the AC/DC adapter it still shows the AC/DC icon. Is this normal?
answer
The battery has internal circuitry that communicates with the main board on the Spectrum Master. Either the battery is defective or something in the Spectrum Master is failing to communicate.  Please contact your local service center to have this issue resolved.