Panasonic HHR-3XXE/2BC Rechargeable Evolta AA 2450mAh Batteries Ready to use: you can use them immediately after buying them. Stay charged: after 1 year still up to 80% of the capacity remains without charging High capacity: up to 7x longer lasting than alkaline*. Combines ready to use with high capacity at the same time thanks to world nr. 1 battery manufacturer technology. Specially designed for consumers with a focus on power. provide an ideal power solution for frequently used high drain applications.