The Uniross Hybrio 2100mAh AA batteries by Ultralast are ready-to-use technology, meaning you can use it right out of the package, just like disposable alkaline batteries.

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 four times longer than a standard disposable battery.

The Hybrio batteries have a extremely slow-discharge rate which allows them to remain charged for much longer, even when not used for very long periods. Hybrio New Technology batteries will retain about 90% of their charged capacity for about 6 months and also hold about 85% of their charged capacity after 1 year on average.

One Hybrio battery has a battery life of over 3 years when recharged between 1 and 100 times during a year if the battery is stored at a temperature of less than 77 degrees.