I no longer serves me that this type of battery. Once recharged, they can serve as soon as we needed and several months after being charged. It's really annoying to have batteries in a drawer, which were unloaded. After several months of use old batteries (same) people do not lose the load (750 to 800 mA) I tien to clarify that I never use a quick charger (which for those who do not know, greatly reduce the life of the batteries), but the charger BC RS900 of technology across, which allows to choose the intensity of load discharge.