This mains powered Battery Charger, Hecht 000620CH, is compatible with Hecht 20v 2.5h Li-ion rechargeable batteries.
The charger will automatically commence charging when attached to the battery. An LED light on the transformer indicates if the battery is charged or charging. The battery has a separate indicators showing the condition of the battery.
A 2.5Ah battery will charge in 2-3 hours.