Bosch is the first out of the gate in the US market for 6.0 Ah 18/20V tool batteries. What does this mean? It means massive amounts of runtime. How much runtime? 45% more than a 4.0 Ah. That is a lot of runtime and will allow the contractor to be more productive on the job.
The packs use the familiar Bosch FatPack setup which is known to run cool and works with all Bosch 18v Lithium Ion tools. Running cool means extended life. Check it out via Bosch.