Ridgid R840095 Gen5X Genuine OEM Dual Chemistry Battery Charger for 18V lithium ion or NiCad batteries with Temperature Monitoring and Energy Saving (Battery Not Included, Charger Only) DUAL CHEMISTRY: This charger will work with both your NiCad and Lithium Ion batteries, so you can power your 18V cordless Ridgid tools TEMPERATURE MONITORING: A panel on the front of the charger will notify you if charging is being delayed due to extremely hot or cold temperatures, and activate accordingly to reduce the risk of damaging batteries SMART ENERGY SAVING: So as not to draw excessive power, the charger will deactivate once a battery is fully charged MOUNTING: You can keep this on a pegboard with the help of the slots located on the back of the charger to maximize your workshop space VENTILATION: The design of the charger maximizes airflow around the batteries, normalizing their temperature to maximize charging efficiency