Hello, Rlm1 - We are sorry to hear that you are not pleased with the run time of your battery! Run time depends on the amp-hour of the battery and the tool. Amp-hour refers to the constant amp draw a battery pack can run at for 1 hour. So, a 4.0 Ah battery can run at 4 amps for an hour in normal conditions. However, tools vary in their amp draws, and if a tool has a higher amp draw than 4 amps, it will diminish the run time. We hope this provides clarity! And we would like to hear more about your experience to see if we can provide you with a good solution! Would you mind sharing more with us at Reviews@RIDGIDmail.com?