Kobalt 40 Volt lithium ion battery charger with Generation 2 Top Load Design provides steady recharging time for all Kobalt lithium ion high powered batteries. -Charges 2.0-ah battery in 60 minutes -Charges 2.5-ah battery in 75 minutes -Charges 3.0-ah battery in 90 minutes -Charges 4.0-ah battery in 120 minutes -Charges 5.0-ah battery in 150 minutes