I have bought one and they are very good!
However found it was too heavy for me! Must be getting old!
So I gave it to my son and bought a 36 Volt Bosch instead!
A lot lighter!
The other concern I have about the Hilti is that the Li-ion batteries seem to be vented so do they let water in?
Some Lithium ion batteries have been fire -hazards, and the metal is fairly reactive! Although I understand it is embedded in some sort of polymer.
Perhaps someone out there knows.The Bosch batteries are completely enclosed, so presumably are not a hazard.