Does it make a humming sound when a phone is plugged into the USB portal and charging?
1282458
No sound what-so-ever when charging phones, ipod, or other USB devices............
1282459
I have several of these in my home, and they have NEVER made any noise when the USB portal is being used to charge.
136183
No it doesn't. But when your phone is plugged in it doesn't stop charging till it's unplugged.
367809
Mine has a slight hum. Some kind of ground loop, I guess. I'm using a 3-pin to 2-pin adaptor on the power cord--the hum is much worse without it. I've tried both the balanced and phone plug inputs (with RCA adaptors)... no difference. I haven't tried breaking the ground on one of the input cables yet.
1017037
I used the USB charger from my galaxy note 3 as well as the cable that was provided And It charges. I did notice that on one side of the headset glows red when in charging mode
1873819
Not sure if it's normal but mine does too as it's charging. It's great,though, and charges my phone very quickly.
2221518
If I charge it at the same time, it will have the buzzing sound. Otherwise, it is perfect and sound great.
62071
No, but I put it up to my ear to see if it did, and all I could hear was a very slight hum. Hope this helps.
1920718
I have not experienced any noise or humming my self,but,according to Nikon`s web site:'AnswersIt is normal for the batteries to make a quiet humming noise when charging. If there are any concerns please contact support at 1-800-NIKONUS! '
1407498
No. Plugged charger; three red blinks then earpiece stop charging without sound. On/off buttons lifeless.
266089
No it doesn't. The only way you would know it's working is by plugging in your phone and see if it starts charging.
2244499
Your phone will do the beeping if it is on sound (and not on silent). The device itself will not make any noise. When it is plugged in, the light on the device will be red, and once it is charging, it will be red and green (solid). Your phone will beep when it starts to charge. With mine, sometimes if there's a power surge interruption, it will disconnect and reconnect and beep. I haven't noticed mine beeping when it gets to 100%.
1412462
The only noise I hear is when you turn it on. Sometimes you will hear it interchange and sometimes you don't. If it has set off for a while it will make a loud click and hum but it goes away in a couple seconds. Other than that it does not make any sound that is noticeable.
978628
I just started to notice that mine also makes the little humming sound. Kinda annoying
379537
It works, but won't charge the 3G S. Does anyone have issues with a buzzing noise while playing music?
387794
Hi, Cyril! My charging cradle quit shortly after I got the Mint. I've had no annoying sounds. Did you try plugging the charger cord directly into the Mint to see if it still makes the sound?
978308
Mine does. My issue is that it doesn't indicate "charged" - just keeps charging until you unplug it.
2244497
When wireless charging, it makes a soft tone. When you remove the phone, it does not make a sound.