Just pick up one of this Battery charger from Poundland Clearence Beckton.
Amazon selling this charger for around £28
The Varta Universal charger is fast and flexible, ready when you need it most. It has the capacity to charge AA, AAA, C, D and 9 v batteries and has a safety timer for your peace of mind. With six LEDs you will always know the status of your batteries and the charger is even equipped with a trickle charge, meaning your batteries will always be at maximum capacity.