° The Energy 16 is the big brother of Energy 8 and recommended for those who really need to frequently and thereby charge many batteries. From a technical point, the devices are identical, in the 16er version only fit more batteries - in all sizes by the way - pure. If only the design is an eye-catcher and also the quality of workmanship is great. Robust and handy you can probably very long lasting listening pleasure. Batteries are charged very fast and even 'presumed dead' were revived again. Recommended !! ~