I just used the Edge until the battery was low, then recharged it. No hum at first, but it came out when the battery was 100% from some hours already. Now I swapped out the first battery and put inside the second, will see if and when the hum will come out again.
I noticed that it comes out mainly from the unit.
Thank you Queue and ivan, your answers are useful too.
Last edited by lorenzoens; 04-30-2011 at 05:31 AM.
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