a vague reference to something so vague we don't know what it means, presumably a vibrator, or something of that nature that needs batteries or perhaps a solar powered energy source.
As found in Yahoo personals: Don't even think about contacting me if you have a purple vagina candle! WTF man, comeon....what the hell is that buzzing? Oh it's just the neighbor on the roof with her vagina candle. God I wish I could get some sleep, tell her to knock it off!!