MattSPL

I used my RHH 181 to drill 2 holes, 450mm through a block wall(cavity in the middle). I used a 12x400mm bit as a pilot hole first, then a 25x500mm bit. There was some wobbling around vibration using the long 25mm bit, but it flew through the wall, faster than the mains drill I have.

The red lithium is just a name, but those Samsung batteries are very good. They might be the same 18650 size as your laptop batteries, but the Samsung are much higher drain than the type in a laptop. An average laptop ICR18650 would be capable of between 5 and 7 amps on its own. Some of those Samsung INR18650's are capable of supplying 30Amps.

I bought a Bosch RHH181 last week. I had initially bought the Milwaukee M12 fuel rotary hammer, but after about 4 weeks trying to like it in work, I found it too slow at drilling. I liked the look of the bosch, and it seemed a great performer from reading and watching videos about it. I demoed it against the Makita brushless model, but preferred the bosch, and it was faster. The Bosch eats through concrete. Great drill.