The Kress KAC04 is a 20 V 4 A dual port charger suitable for all Kress 20 V KrossPack Lithium batteries. It can charge two 20 V 2 Ah KrossPack batteries in an hour, or just one even faster so your tools never run out of power. 
• The dual-port design allows you to charge two batteries at the same time, charging two 2 Ah batteries in 60 minutes 
• Quickly charge a 20 V 2 Ah battery in 30 minutes or a 4 Ah battery in 60 minutes to reduce downtime between charges 
• The built-in charge indicator shows the status of charge (fully charged/ charging / temperature out of range / battery fault)