HI, good question, I think I can answer as I have had these since 2010 when I first bought one then began selling them here on the forums. Make sure that you never charge the battery more than overnight or about 8 hrs, If not in use for long periods, it is ok to leave them in the egg charger, but not plugged in, You could leave it in the Pleo also if not using your pleo for a long time, but it makes more sense to me to store in the egg charger and the charger without the adapter cord in the original box to help prevent against dust etc. Also store on a shelf or somewhere away from direct sunlight, radiators or heaters, moisture or anywhere damp. When using again, wipe off with just a dry cloth to get any dust, then you do not need to recharge unless it was fully discharged before putting away, Hope that helps some. RWM