I Recently Bought A New Digital Multimeter. I Tested It On A 1.5 V Battery And It Returned A Voltage Of 1.46. That's Ok, But When I Tested It On An Ac To Dc Adaptor (the One I Use To Recharge My Cellphone) Which Outputs 4.5 V Dc, It Returned Something Like 7 Or 8 Volts. The Same Thing Happened With Other Adaptors Of Different Output Voltages. What Am I Doing Wrong? I Have Set The Multimeter To The Appropriate Scale (20 V) And The Probes Are In The Correct Places. I Even Used A Resistor So As Not To Burn The Multimeter's Fuse. Please Help -- If You Can!