Does it make any kind of sound while on charging, mine does. Also is there any indicator that shows that the spare battery is charging ?
1356084
It didn't before I put it in the trash. The red light I believe on the back where the spare battery charges is the indicator, and when it turns green you're good to go. Mine didn't last two months before it just completely quit charging on the dock. I got rid of dock, but kept the cable to be able to charge my phone with just that.
1073455
I haven't noticed a hissing on mine. I'd contact the manufacturer, in case it's a safety issue. I did once, have a hissing sound on another charger, and that was because we had inadvertently put non-rechargeable batteries on it... yeah, it kind of fried it. Wouldn't work afterwards.
1376311
The indicator light does change to show that the battery is fully charged. I haven't used my charger in a couple months. So, I don't recall exactly what the light does. If memory serves me well, it actually blinks red when charging, and shows solid green when it is done charging.
978308
Mine does. My issue is that it doesn't indicate "charged" - just keeps charging until you unplug it.
817764
That's how it is. When it charging it does not stay on to let u know that it's charging.
852924
It's normal, unfortunately it doesn't have an indicator of when is fully charged. It usually charges in about an hour if not used while charging
1237882
there really isnt an indicator. I just charge it at the end of the day and go with it the next day. hasnt disappointed me...yet
772147
The unit itself does not make a sound. Rather the blue LED indicator light shows charging activity and remaining charge. Your device that is plugged in May make its normal charging chirp. For example I've charged iPads, iPhones, an iPod and a windows phone and all make a charging sound once plugged in and you turn on the unit (don't forget to power it on of course) �. Hope that helps.
727241
It does not make any noise at all, unless you use the tire inflator and then that sounds like a sewing machine but to just run a lamp or a fan or a laptop or charging my phone it does not make any noise at all. I like this unit because I can jump my car off or my wife's sisters minivan with no problem. and I can also run a fan or charge my cell phone if there is a power outage I ran a fan a laptop and cell phone for an hour on this charger during a blackout but to answer your question it does not make a sound at all unless you use the air compressor on it.
1303167
No, the device does not make a sound when it begins charging. However, my phone, a nexus 4 running CM10 in non-silent mode, does beep. So just make sure your phone is on silent or vibrate.
975536
The only time it will make a noise, is when your device (phone, etc.), reaches 100 percent when plugged in to charge.
777949
No I have not heard it, mine is silent, though I have yet to use it for long periods. I don't think it's normal, but if it still does what it says on the pack it's ok.If it's not broken don't fix it!
1620282
no noises. But I haven't used it for over 2 months and will throw it away. very disappointed. It stopped charging after three or four uses. Perhaps the noise is a good sign??
1090692
Hi. I started charging mine as soon as I unboxed it. It had some charge to it but not 100%. So far mine is ok but I hope both of us didn't get a refurbished product. Maybe someone else will reply too.
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! '
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.
1150030
Please clarify: It makes a noise while charging, a new noise you've never heard before? Do you have the brush head off while charging? Does that make a difference? I think it simply might be turned on without the head on, and see if pushing the button stops the noise. When it's making the noise, put screw the brush head on while it's still in the base, and see if the brush head activates - confirming it's "on."