Dewalt DCBL790M1 40V MAX 4.0 Ah Li-Ion XR Brushless Blower

Model: dewndcbl790m1
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Dewalt DCBL790M1 40V MAX 4.0 Ah Li-Ion XR Brushless Blower Model: dewndcbl790m1

Product Features & specs :

Dewalt DCBL790M1 40V MAX 4.0 Ah Li-Ion XR Brushless Blower

The Dewalt DCBL790M1 40V MAX 4.0 Ah Cordless Lithium-Ion XR Brushless Blower provides the ability to clear heavy debris with an air speed up to 120 MPH and 400 CFM of air volume. The lightweight, ergonomic design is engineered with a variable speed trigger and speed lock to provide full control.
  • Produces up to 120 MPH to create 400 CFM of air flow performance
  • Variable trigger and speed lock allows you to select your speed and keep it constant
  • Lightweight and ergonomic design minimizes fatigue during prolonged use
  • Designed to withstand everyday heavy-duty usage
What’s Included:
  • 40V MAX Cordless Lithium-Ion XR Brushless Blower - DCBL790
  • 40V MAX 4.0 Ah Lithium-Ion Battery - DCB404
  • 40V MAX Lithium-Ion Battery Charger - DCB114
Air Speed (MPH)
UL Safety
CSA Safety
Batteries Included
Battery Type
Starter Type
Speed Settings
Air Flow (CFM)
Mulching Capability
Speed Controls
Noise Rating (dBA)
ETL Safety
10.4 lbs.
Warranty Term
3 Year

Reviews :

4.2 / 5.0
39 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Would you recommend this product?
Yes (26)
No (3)
Powerful (20)
Easy To Use (13)
Battery Longevity (if applicable) (5)
Lightweight (5)
Short Run Time (if applicable) (3)
Not Durable (1)
Heavy (1)
Best Uses
Frequent Use (8)
Small Projects (5)
Home Repair (4)
Heavy Duty Requirements (2)
Would you recommend this product?
Easy To Use
Best Uses
Frequent Use
Small Projects
Decent blower, not great. Had to fix a switch problem early on.
Dewalt quality not what it should be anymore. Switch acted up early on, interference with the switch lock somehow. Works fine ever since. Have had all 40v tools apart for repair early on. No problems with belt yet as others have noted but doesn't look like it's too robust when I had it apart.
March 31, 2019
over 3 years ago
Describe Yourself:
Great for my wife!
I bought this blower to replace my gas echo blower. My gas blower is powerful for maintaining the leafs and grass clippings on the lawn, driveway, around our pool and our garage. The only issues were that my wife had to prime the gas bulb, adjust choke and pull the cord 3-4 times to get it started. Then the exhaust smell would linger around in the garage and her hair lol. The 40 volt Dewalt blower is her new favorite outdoor tool. She gets the same job done with less effort and no gas and exhaust smell. Just charge the battery. Clip it back on to the blower when fully charged and pull the trigger and you’ve just waken up an air blowing beast powered by a 40 volt battery with no gas smell!!! I’m slowly converting my lawn equipment to battery power thanks to Dewalt. I’ve recently bought the 20v hedge trimmer and im just as impressed with the power and weight of it also.
This review was collected as part of a promotion
November 12, 2018
Originally posted at
First one broke, second one has been great
I invested in 3 different tools using the same 40V system. The blower started having problems making a squealing sound with a loss of airflow intermittently. This problem became continuous, it was unusable. Fortunately it was still in warranty, DeWalt switched it out for a new one. Very happy with the performance, plenty of airflow, battery lasts long enough for me. Yes it is an expensive system, and I imagine most of that price is for the battery and charger. But I avoid the corded or gas powered blowers which have their own disadvantages. It is a little heavy, but only using it for 10-15 minutes is okay. I would buy it again.
September 28, 2018
Originally posted at
Great product
Love this product! Simple to use so easy my kids can work it. Great battery life compared to other cordless brands.
September 4, 2018
Originally posted at
Good Handheld Blower
A Good addition to your Dewalt tool collection especially if you need another battery for your Dewalt lawnmower. The downside is that it only comes with a 4Ah 40V battery and not the 6Ah 40V battery but is a pretty good backup. One note is that the conical nozzle does note come with the blower like the store display had on it.
August 14, 2018
Originally posted at
not heavy duty
loved it for the 1 year that it worked, but motor has just died.

I used it for maybe 2 hours a week over the summer and lived with the poor battery life (in fact bought another so I had two)....unfortunately it cannot handle this 2 hrs a week workload
August 10, 2018
Originally posted at
Excellent for what it is "Battery operated"
Had this unit for about 6 months. Works a little better than expected. Clean up after grass cutting, small leaf tasks. Can't expect more from battery blowing 400cfm constant. It won't replace gas unit for larger jobs.
July 27, 2018
Originally posted at
Would you recommend this product?
Great tool to clean up leaves and dust very easy1
Easy to use.
It helps me clean the interior in my car!
Battery doesn't last long enough.
May 24, 2016
Would you recommend this product?
Blow-Out or Not
Charge the battery, and this works right out of the box. I use it to clean up the garage floor, patio and walkways and enjoy its performance. Great tool to own.
May 22, 2016
If it worked, I would like the product.
It appears to be a great product, but it didn't work out of the box.
May 19, 2016

Q & A :

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Browse 14 questions Browse 14 questions and 28 answers
Does this blower have a thermal overload shut off on it?
I just got this blower and after about 5 mins of use it shuts off.
Bob on Apr 14, 2016
BEST ANSWER: Don't know about the thermal cutoff. Mine has never shut off on me. Make sure your battery or charger aren't bad--batteries especially I've heard can be duds.
Sent from my iPhone
Can i use 2 20 volt batteries in this?
A shopper on Nov 12, 2016
BEST ANSWER: No you can not use 20v batteries on this unit . It has a much larger 40 volt battery.
Any belt problems?
Douglas V on May 6, 2017
BEST ANSWER: Nope. The new models have a different design on the belt pulley. Love this blower.
how does this unit compare in blowing power to the gas powered units? how long - number of minutes, will the blower battery last?
No nickname. Name is Ted on Sep 25, 2015
BEST ANSWER: I sold my Echo backpack blower because this cordless has almost the same CFM. Now I use it 10 times more than the gas ones because I don't have to check the fuel, (mix gas and oil if low), prime it, choke it, start it, let it warm up then use it. With the cordless DeWalt you just pull the trigger! So it gets used way more, great for cleaning off sawdust in the shop because your not running a gas engine inside. I mainly use it for leaves and blowing grass off the driveway after mowing. Also clean off the 4 wheeler, lawnmower, pollen off of vehicles etc. Im very happy with the unit, the other thing is I had a hand held gas blower but my hand would go numb because of the vibration of the gas engine and it could also burn your leg if you weren't careful. My wife and kids use this to and don't have to worry about them using the wrong gas or not getting it started!
How do you remove the timing belt pulley?
A shopper on Sep 8, 2018
BEST ANSWER: Your question will be best answered by the manufacturer, who can provide you with the accurate information. The number to reach the technician directly is 1-800-433-9258 or online at
Will the flex volt battery work with this blower?
A shopper on Oct 16, 2016
BEST ANSWER: The flex volt system is only compatible with the 20 volt series.
Does this model (40V Cordless Blower) come with other attachments - i.e. hedge clippers?
If not does Dewalt have dual purpose - battery powered - lawn tools?
None on Aug 2, 2015
BEST ANSWER: No, the blower does not come with any attachments. However, Dewalt DCHT860M1 is the model number for a hedge trimmer that operates on the same 40V system.


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.