Some companies already use the phrase "extreme cordless" to
describe their 18-volt lines, so what's a fitting moniker for a
36-volt cordless tool? Super-mega-double-happy-number-one
cordless? Well, Hilti just calls its powerful cordless rotary
hammerdrill the TE 6-A. It's the first 36-volt cordless tool
I've ever tried.  You can switch the tool's hammering action off
for drilling in wood and plastic. It comes standard with Hilti's
TE-C chuck, and also accepts an optional 1/2-inch, Jacobs-style
chuck for smooth-shank bits.  This hammerdrill is all about
portable power. It will drill holes up to 5/8-inch-wide in
concrete, 3/4-inch-wide in wood, and run a hole saw as big as 4
5/16 inches in diameter. It broadcasts a feeling of
durability–this is one tough tool.  Like lots of high-voltage
cordless tools, the TE 6-A deserves the same respect as a corded
version. You definitely need two hands on the tool at all times.
The hammering mechanism is the same piston-and-crank-shaft type
used in Hilti's corded hammer line