Hello all I just received my very first airsoft gun in the mail today its an a&k m4 s system I let it charge for about 4 n a half hours and then I put it in the gun n shot a couple bbs maybe 20 tonight Anyways. I plan on going to the airsoft arena tommorow will the battery. Be good for tommorow? Its a 8.4volt how. Long does the battery charge usuall last? Should I charge it again B4 playing?