Is a Power Pack compatible for use with a Slidelock system that is approximately 15 years old?

Fifteen years ago, the same extrusion was used on the tube as is currently employed. Therefore, as long as the Slidelock system is indeed 15 years old, the Power Pack should fit seamlessly. However, if the system in question is a Reel Easy Telescopic, the adapters differ and thus, the Power Pack would not be compatible.