Black & Decker - VersaPak Gold Battery! I like using B&D VersaPak Tools for light duty hobby activities in my laboratory. The interchangeability is a handy feature. I have used many batteries including B&D VersaPak Gold and Silver. The GOLD Batteries due last longer than the Silvers. In my opinion, 60% is stretching it. Depending on cycles to include complete discharge, amount of use and other factors, 40-50% would be more accurate. The GOLD Batteries are not as impacted by the "memory" fade that the silvers are. For the same price or up to a couple dollars more per battery, the GOLD Batteries are a better buy.