Rechargeable batteries for extended power NiMH batteries provide reliable power for a variety of devices. Can be easily recharged to allow extended use. Duralock Power Preserve and Precharged/Staycharged technologies provide optimal performance. Ion core offers long-lasting operation. Batteries last up to 1 year. Duracell(R) NiMH AAA Rechargeable Batteries, Pack Of 4, NL2400B4N001 is one of many AAA Rechargeable Batteries available through Office Depot. Made by Duracell.