The best parts of this are,
-The dead packs are modified, not the tool, so I can pop out My Modified pack and put in a regular battery if I need to get to a tight area where the cabled battery would be tough to work with.
-This battery has a much higher amperage than the standard battery packs. I find it lasts more than 5 times longer than the standard packs on a single charge.
- The actual life of this battery is longer than the regular battery packs.
-Cheaper and universal. One battery, several tools.