Purchased 2 batteries since I had multiple tools. However, I have been able to easily trim the entire yard (front/back) and use the same battery to blow off the driveway, sidewalks and patio.
This battery provides dependable power although it is a bit short of finishing my half acre yard. Probably need either 5 or 6 ah battery. Have not tried that. Have found Greenworks products to be good and am pleased.
The only reason for the four star review is because the battery cut off a couple of times during the first use but it fired right back up when I tried the handle again. Got through my whole yard with a couple of bars left on charge.