Originally Posted by slownsteady
What about data points for durability, battery life, comfort, etc etc, etc.?
No company tells you their reliability calculations or accelerated life test results.
Highly Accelerated Life Test - Wikipedia, the free encyclopedia
Battery discharge time is roughly the amp-hours divided by current draw, but they don't publish avg. current draw, either.
"High drain applications such as power tools may require the battery to be able to supply a current that would drain the battery in 4 minutes if sustained (e.g. 22.5 A for a battery with a capacity of 1.5 A·h)."
The original battery manufacturer [OEM] may tell you the charge/discharge cycles you can expect.
Lithium-ion battery - Wikipedia, the free encyclopedia
Now that we're talking about it, the real hidden-cost-of-ownership for these tools may be the cost for replacing batteries & chargers.
Whatever they do publish that is important to you - torque, RPM, weight, hp [probably about 1/4 hp], etc., you can plot vs price and see who is competitive and who isn't.