Battery Mechanisms (Mechanical Mods) MehMody - this is Battery Mode, in which there is no charge at all, which means that there is nothing to break and spoil here. "Eternal", as many call them. Without a board, without electronics, just a carcass, which works directly from the battery (or from batteries). Therefore, the quality of the MehMod itself depends on the quality of the battery you choose. The article on batteries will help you make the right choice.