The Duracell Recharge Ultra AAA batteries can be charged up to 400 times and with a Long-Life Ion Core you get the most out of every battery. Plus, they're pre-charged so you can use your devices right away, and they stay charged for up to 12 months when not in use. In addition, unused Duracell batteries last at least 5 years. These powerful NiMH batteries can be charged in any NiMH charger. Because they last longer and require less charging, Duracell Recharge Ultra batteries stand out from the rest. The Duracell Recharge Ultra AAA batteries can be charged up to 400 times and with a Long-Life Ion Core you get the most out of every battery. Plus, they're pre-charged so you can use your devices right away, and they stay charged for up to 12 months when not in use. In addition, unused Duracell batteries last at least 5 years. These powerful NiMH batteries can be charged in any NiMH charger. Because they last longer and require less charging, Duracell Recharge Ultra batteries stand out from the rest.