The DEWALT DCB114 40V Max Li-Ion Battery Charger keeps your DEWALT 40-Volt tools charged and ready to use. This charger will accept all DEWALT 40-Volt max lithium-ion batteries. The DCB114 features on-board diagnostics that let you know what is going on with your pack; the LED indicator communicates battery status of 'charged', 'charging', 'replace pack' and 'battery too hot or too cold'. This unit charges the 4 Ah 40-Volt max li-ion battery in 90 minutes or less and can charge the 6 Ah 40-Volt max li-ion battery in 130 minimum or less.