This pack of four Duracell Duralock AA HR6 2500mAh Pre-Charged Rechargeable batteries is the perfect choice for all high-current draining devices such as games controllers or flashlights. Their patented Ion Core technology means that they will last for a guaranteed five years and they come with a full replacement warranty, while another of Duracell's advanced technological innovations, Duralock Power Preserve, lets them stay fully charged and ready to use for up to a year in storage. Unlike many rechargeable batteries, there is no need for a lengthy initial charge period to prepare them for use; their long storage life means that they can be shipped fully charged and ready to use as soon as you take them out of the packet. When recharging is needed, the batteries are compatible with.