I am used to using a larger Husky back pack blower, the second biggest Husky makes, so that's the background for my review.
Initially I purchased a Ryobi 18 volt blower to do 2 small deck areas (about 400 square feet) at my home during leaf season. I was sorely disappointed at battery life. I didn;t require lots of volume but I did need 15 minutes of blower action. I returned the Ryobi the next day. Months alter I learned about this Dewalt 20 volt blower and bought it based upon good reviews. So far it has lived up to the reviews I read. Battery life is surprising. I used it for 20 minutes continuously at full on and still had 2/3 battery power left. It doesn't have near the power of my Husky backpack, and I didn't expect it to, but it has enough power to blow leaves very well. I wouldn't expect it to blow wet heavily piled leaves but dry stuff moves readily. The effective reach of air movement is about 6 feet or so. Since it used the 20 volt batteries and I have the adapter for my 18 volt Dewalt drills, grinder, impact driver and vacuum I can use the batteries interchangeably.
I've seen other cordless blowers out there with 40 volts or so and they may be more powerful but they cost more and I can't use batteries interchangeably. This blower does all I need it to do and is surprisingly efficient and effective.