These are the highest quality/economically priced stick packs in the business. These 4500mAh voltage enhanced cells have the highest voltage available for those seeking blistering speeds. Each cell is cycled and voltage enhanced to assure the quality and highest performance of each cell. Each pack is hand soldiered, no spot welds here, to provide nearly a failure proof battery pack. These packs are perfect for you Traxxas Slash,Emaxx,E Revo.