To use this charger, simply place the IDX Endura Elite batteries into the available charging bays. Plug the charger into a power source and it will start charging the batteries. Be aware that one of the charging bays is broken, so avoid using it. When not in use, store the charger and batteries in a dry and cool place. Keep them away from direct sunlight and moisture. Regularly check the remaining battery capacity and recharge in time to ensure long - term usability.