I've used DeWalt 18V for years, tried others, always went back to DeWalt. I now have DeWalt 20V. I have a cople of 2AH, some 4AH and 4 @ 6AH. I like the weight of the 2's best.
When using, be sure to have a sharp TAPPING bit, not something in a bit kit or from a hdwe store. Then as the drill shows signs of slowing, change the battery. Especially on the Lithium batteries, they go from good to dead very quickly, but while good they last far longer, it just at the end of charge where they go quickly to dead.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.