Hybrio NiMH AA rechargeable batteries (pack of four)

The Hybrio is ready-to-use NiMH technology, meaning you can use it right out of the package, just like a disposable alkaline battery. The advanced technology used in Hybrio batteries allows them to retain a long-term charge - even if they are not used for months - and also be recharged up to 500 times, combining for the first time the instant-power convenience of disposable alkaline batteries with the reuse and long life benefits of rechargeables. Not only is the Hybrio better for the environment because it is rechargeable, but it is also lasts three to four times longer than a standard disposable battery.

These Hybrio 2000mAh AA batteries will retain their charge for MUCH longer, when stored, than the high capacity/high drain batteries i.e.- 2400-2700mAh

Ultralast claims that after 6 months of storage the battery will retain 90% of their capacity - since this is really new NiMH technology we will see if this is really true but if they are only half right, this is really exciting!