The hama delta plus charger 4x aa ready for power batteries set comprises 4 ready for power 2100 mah 12v batteries and a high quality battery charger in compact designrrthis charger has a transparent battery compartment cover and can be used all over the world mains voltage 110 240v 5060hz it comes complete with a mains adapter and vehicle charger it has the ability to switch over between the functions of battery charger and powerbank the charging is cut off by exact minus delta