OK, maybe a little snide, then
Had I known your basis for the 2.2amp thing, I could have pointed to the nessesary info earlier. Frankly, shorting out the charge terminals would have never occured to me, it's for voltage measurement only.
I have thought about 'real' run time tests (gentle peak charge and discharged in a car), but we know mathematically that a 100mah car should run twice as long as a 50mah car. I've killed a motor on one charge HEHE.