Velleman universal battery charger discharger velleman k7300 unlike many other battery chargers the velleman universal battery charger kit enables you to charge both nickel cadmium nicd and nickel metal hydride nimh batteries they can be charged either quickly 52 minutes or normally 14 hours in order to ensure the battery is fully discharged prior to charging and thus has a longer life cycle an automatic discharger is also fitted velleman k7300 universal battery charger discharger