We are sorry for the inconvenience with your tool.
Each tool is going to provide different runtime depending on the battery that is being used, the application, the environment temperature, etc.
Please make sure that the battery that you are using is fully charged and try to use a bigger AH battery with the tool. This should improve the runtime of the tool.
If after trying the instructions provided before the tool loses power fast, please reach our customer service team so we can assist you.