Ansmann's New Max E Pro opens a new door to ultimate savings and performance. The perfect solution for wireless mic applications, IEM's, and any other electronic devices where you would typically use an alkaline battery. (effects pedals, remotes, pre-amps, LED lighting etc) This is a low discharge, high recycle batteries with up to 2000 recycles. Run-time capabilities in various microphones tested (Shure, Sennheiser, Audio Technica) yields over 8 hours of continuous use. Also, the battery is a slimline battery with no "fit" issues - available for use in all wireless mic and IEM brands.