High Pitched "Whining" Wiimote?

[bleemus]

I've had the Wii pretty much since it came out and noticed that the batteries didn't last as long as I was wanting them to in the Wiimotes.

So, I ended up buying some of those Lithium AA batteries.  Not rechargable, mind you, just batteries that are supposed last a great deal longer.

I noticed a high pitched whine or "hum" from the wiimote a short time after I started using these batteries.  It doesn't seem to be coming from the speaker, nor is it vibrating or anything... just a high pitched whine from the inside... somewhere.

I need to put regular batteries back in it to see how it reacts, all the others have normal batts in them, but I was just wondering if anyone else had an issue with these type (or any other type) of batteries.  Perhaps it is even happening to some people using "normal" batteries?

[ChadTower]

Does the Wiimote have a DC motor in it?

[bleemus]

Does the Wiimote have a DC motor in it?

I'm not a hardware guy, but this disassembly article says something about a DC to DC capacitor... so, maybe?

[Howard_Casto]

Well it has rumble support and it uses batteries, so yeah guys I'm pretty sure that it has a dc motor in it. 

[ChadTower]

Wasn't sure if it had rumble.  I would suspect the DC motor then, no idea why it would happen with one type of battery but not the other.  That is, since you say it's not the speaker, which would be first culprit.