AAA size batteries are one of the most often used batteries to power high energy consuming, regularly used devices. These high energy consuming devices could be those, either used in the work place or for general use in the home. When they are used so often and require such high amounts of energy, it is necessary to replace them more often. These Duracell Ultra rechargeable batteries are real for those circumstances. A simple recharge will have your battery working to its full potential again, powering those much needed devices. The DuraLock technology will even allow you to leave it unused for up to one year after recharge, whilst at the same time containing its recharged energy, ready for you need it again.