Confused about how to extend the life of your batteries? Not sure if you should leave the devices plugged into the charger or let them fully discharge before charging? Most devices with Lithium batteries work with charging cycles of usually 300 to 400 full cycles per battery. A charging cycle is either a full discharge followed by a full charge or a partial cycle which is a partial discharge followed by a charge of the same amount. Partial cycles can be added together to co