What does it mean when my mobile device says "this accessory may not be supported" or something similar to that? Does it mean I have to get a new charger?

Does the charger actually chafe the phone?

I have same thing with one of mine I got from the market.

But as it still does the job I just ignore the alert

My stereo has a similar issue where it doesn't charge but still plays music so it suits me still

Hope that eases your mind.

Sorry meant charge not chafe haha.