Most days, at the end of the day my Zerolemon battery is somewhere around 30%. I just plug it in, using the original Samsung charger which has it at 100% by morning. I'm sure I could extend battery life by figuring a way to shut off charging before it gets to 100% (maybe a timer?) but the law of diminishing returns says there comes a point where I question whether the extra time and effort is worthwhile.
What I'm hoping is that Zerolemon will make additional batteries available for those who already have the Zerolemon case. In fact, if I have time today, I may contact them and see....