Wuzzat?
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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.
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