The 4aH battery bundle comes with one Hyper Tough 4aH batter along with The New Hyper Tough 12-Volt Max Fast Battery Charger. This fast charger has approximately a 1-hour charge time for Hyper Tough 12V 1.5Ah and 2.0Ah batteries. It includes a charge indicator light, so you know when your battery is charging or ready to use. The red light will indicate that the 12-Volt battery is actively charging. A green light will indicate that the battery is fully charged and ready to use.