I just got my Njoy e-cig the other day. And the manual says the battery should charge for 3 hours the first time and about 1-2 hours after that. Both of my batteries seem to only charge for about 20 minutes (charging light turns green). And then they dont last very long at all. Not all day like others are saying. Also the e-cig seems to give me a great hit right when I put the new battery in, but immediatly (next puff) it seems as though nothing is happeneing and little smoke is coming out. Any suggestions?