Hello Owner,

It is unfortunate to hear that the run time is unsatisfactory. The run time of a lawnmower is dependent on the load acting against the unit and fluctuates depending on the height setting, the terrain, grass height, type of grass, whether you are mulching, using self-propelled function etc. - there are so many factors to consider. The run-time of a battery would depend on the load acting on the unit while in use (speed, terrain, unit height, grass height, and density). Please be aware that the more power being used from the lawn mower (i.e. lawn mower speed, terrain, grass height, density, etc.), the faster the battery charge will drain. Here are a few tips to help you extend the run time.
1) Set the mower to the highest cutting height (or 1/3 of the length of grass), mow no more than 1/3 of the total length at a time.
2) Mow in the morning or late afternoon to reduce the heat stress on newly cut grass and ensure that grass is dry.
Lastly, while all our 60V batteries can be used interchangeably with our 60V tools. *Some exceptions do apply for the 60V 8.0Ah battery.
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.