The GP ReCyko+ Rechargeable AA 2600mAh - 4 Pack come fully pre-charged. These are the new generation of 'green' batteries, and can retain up to 80% of their charge whilst not in use for a period of up to 12 months.
Price: £4.75 from PicStop
Pre-charged, ready for use. More powerful than Alkaline batteries. Stays charged > 1 year (when not in use). Can be charged > 1,000 times.
Size: AA/Mignon/R6. Technology: Stay charged ReCyko NiMH. Capacity: 2600mAh. Voltage: 1.2v.