Originally Posted by EM1_ChRiS
When i let off my throttle, my lights do dim and rpm is around 500. But i do have the radio on with my lights and fogs.
Your batter probably just isn't fully charged. Do you know how to use a voltmeter? You can check your battery yourself.
After your batter has been FULLY drained, you should get your battery recharged at a local shop (most places even do it for free and it takes an hour or two) as driving it around and relying on the alternator to do all the work isn't the most efficient way to charge a battery from 0% to 100%.