This Duracell Hi-Speed battery charger comes with 2 x AA rechargeable 1300mah NiMH batteries and 2 x rechargeable AAA 750mAh batteries. This Duracell battery charger can charge 2 or 4 AA rechargeable batteries. It can also charge 2 or 4 AAA rechargeable batteries. New sleek compact design. Duracell Part Number CEF14 UK. When using this charger please place your batteries in slots 1 and 2, or 3 and 4. The charger will not charge 2 batteries in slots 2 and 3. Full time to charge 1300mAh AA is approximately 4 hours.