Sony Compact Charger. The advantage of this particular charger apart from being cheap is that the 2 AA batteries it comes with are the newer Ni-MH type that hold 85% of their charge up to a year after being charged unlike normal Ni-MH batteries. I have actually found 2 variants, some come with 1700mAh batteries and some 2000mAh, the one with the 1700mAh batteries are the normal Ni-MH not the long lasting ones. There were also packs of the long lasting Sony rechargeable batteries for about £3(AA and AAA)
Instore only i would assume.