Help Battery charger making high pitch noise?

[paimon.soror]

Impossible for capacitors to make noise. Please refain from posting misinformation.

Actually, capacitors can and do make noises. Depending on the technology of the capacitor, it can make a whining noise when charging or discharging.

Another source of a "whining" noise can come from a coil based inductor used on older or high powered circuitry, this was usually remedied by placing a drop of hot glue over the inductor to prevent the coils from vibrating over the magnet.

Chances are however, the capacitors inside of the charger are SoC caps, and those generally do not make any noise, therefore one can make the assumption that the whining is coming from the transformer, which, albiet normal in high powered operations, isn't normal for a device of this stature.

Moral: Electronic devices "whine" by nature, sometimes the frequency of the whining is too high or too low for us to hear it.

Moral2: for safety, replace the charger

 

[Deleted User]

I started a thread this past weekend here with the same problem:

http://androidforums.com/support-troubleshooting-incredible/71620-noise-coming-wall-charger.html

Anyway, I went back to the Verizon store yesterday and the manager swapped out my charger for a droid charger. It works perfect now.

 

[5thElement]

Actually, capacitors can and do make noises. Depending on the technology of the capacitor, it can make a whining noise when charging or discharging.

No, they really dont. I have an EE degree and have been in this field for years. It is not possible for capacitors to generate "whine" or noise, they do not move, nor do they create a magnatic feild anywhere near strong enough to move themselves.

 

[chris61292]

Happens to me when battery is fully charged. SOOOOOO annoying

 

[paimon.soror]

No, they really dont. I have an EE degree and have been in this field for years. It is not possible for capacitors to generate "whine" or noise, they do not move, nor do they create a magnatic feild anywhere near strong enough to move themselves.

and I have a M.S. in electrical engineering and B.S. in computer engineering and am currently working in military aerospace dealing with this stuff everyday.... clearly one of us was miseducated....

so lets just leave it at : "be safe and replace the charger"

 

[DonDraper]

No, they really dont. I have an EE degree and have been in this field for years. It is not possible for capacitors to generate "whine" or noise, they do not move, nor do they create a magnatic feild anywhere near strong enough to move themselves.

You might want to dig up your old class notes and review them

 

[darbaugh]

the charger that came with my phone did this, after about 10 minutes of being in the room with it i'd have a splitting headache. I took it to the vzw store i bought my phone at and they just gave me a new charger, and all is good now

 

[aliasfoxkde]

If you hear a high pitched whining sound, try plugging something into it (that's not charged) or turning it off. You might also be over charging it. It's really just something certain capacitors or hardware does when not in use but still have stored energy. It's perfectly normal but yes it can be annoying. Think of it as in idle.