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 tool is amazingly powerful I love it. I just wish there was a little bit more adjustment and precision height adjustment for the wheel. I also wish the charger wasn’t sound loud when it’s charging, it loudest charger I have heard. It sounds like one of those air mattresses air pumps.