Canon LP-E8 battery has no memory effect of charge, it can be charged anytime and for as long as you want; the recharge will not occur after the charging process has ended the charger will turn off and the battery will not deteriorate. In order not to damage the battery, do not charge it at a low temperature and discharge it completely. If you do not use the camera for a long time, you need to store the Canon LP-E8 battery separately from the device, charged at 40-60%. After about a year, you may notice a slight decrease in battery capacity, even if you take few pictures. The aging process occurs and after two or three years the battery becomes unusable.