I use my tools heavily. We had a special project on which we needed 3 new battery powered drills. I bought this kit that had the 2 Makita drills in it and a Black and Decker drill. All of the drills have 18 volt lithium batteries. We used each drill doing the same task for the same amount of time over 3 contiuous days. The B&D battery had to be recharged after each day. The Makita batteries went all 3 days without a charge and still had a lot of power left. One of the Makita batteries was also used to saw thru some 2X4s with the sawsall. I have a Makita AC powered sawsall and the new battery powered unit is as powerful as the AC unit. The battery powered sawsall has a new blade changing feature which makes blade changing super easy because no tools are envolved.
The bag that comes with the kit is really heavy duty and should last for years. It is big enough to add a lot of other stuff if you need to. It is so well made and nice looking, you may want to use it as a travel bag instead of a tool hauler.