1. The batteries are ready to use as soon as you have removed them from their packing.
2. They will stay ready for use for over a year without the need to recharge.
Type AA Nimh+ (any nimh charger will work)
Capacity Nominal 2300mAh (about the same as a good non-rechargeable)
Capacity Rated 2200mAh
Normal charge: 15hrs with 230 mA max
Rapid charge: 4000 mA max
6 months About 80% of charge is held
12 months About 70% of charge is held (normal nimh would be empty)
Free Case and Post
Also you can get 8 for £10.50
These batteries got an excellent review here.