Hello BruceL,

Thank you for your feedback. We are sorry to hear that you are dissatisfied with the run time of this battery when used in this String Trimmer.
It is important to adjust your trimming techniques to make the most out of the battery life. This unit is advertised as running up to 40 minutes with a fully charged 2Ah battery, but it goes without saying that that the harder the unit works, the quicker the battery drains.
Here are a few tips to help achieve the optimal run time.
Cut with the bare tip of the line because this is the section which moves at the highest speed. Do not let the line slap into grass. Ease the line into grass, bit by bit. You should not allow all the line to meet the grass as this will tend to slow it down causing it to lose momentum and it will not do a good job of cutting.
Remember to always have the guard and the metal flower guide on while using the trimmer. This will prevent the line from snapping off and going back into the spool housing.
We hope these tips will help! If not, we would be happy to investigate to see whether your run time would be considered average; please submit an email using the customer contact page on our website or give us a call at 1-888-909-6757 (1-888-90WORKS). All we ask that you have access to the unit so that we can complete troubleshooting with you and gather necessary unit information.