I was just woundering if I should wait to recharge my ego batteries when they are totally dead or is it ok to charge them when I think they are close to shuting down. It is really not a problem or anything cuz I have back ups. But I work over nights and like to have two fresh ones just in case. All my batteries are 650mah cuz I like the size and they last long enough for my needs. Any input would be great.