Milwaukee 2825 21st Brushless String Trimmer: Review

By Power Tools

August 31, 2022

Trimming a garden can be really hard work if you don’t do it regularly. And these are times when you have to consider investing in a good trimmer to make your life easier. Something powerful and durable at the same time.
There are several options available in the market regarding garden trimmers.

If you want to purchase, one of the best options is the Milwaukee 2825 21St Brushless String Trimmer. I made the purchase a few months ago, and it has been a great experience.
Today, I will share some of my experiences with this trimmer – things you need to consider, the main specs of the trimmer, and some pros and cons you should know about. So read on to find out a detailed review.

What To Look For In A Garden Trimmer?

Size and Weight

Think about the size of the unit and whether it can handle the trimming needs of your garden.
A lighter trimmer would be easier for you to maneuver if you have a smaller yard. If you have a larger yard, a heavier trimmer may be more powerful and able to get the job done quicker.
Additionally, if you plan on using the trimmer for long hours, a lighter trimmer would be less likely to cause fatigue. Ultimately, it is important to consider how you will use the trimmer and choose one best suited for your needs.

Power source

What power source you will use for the trimmer is an important consideration. If you need one you would have to carry around, go for a cordless one.
For shorter areas, corded, battery power sources can come in handy. Some trimmers are battery operated, while you need to plug others into an outlet.

garden trimmer machine


You need to think about the blades that are coming with your trimmer. Some trimmers come with one blade, while others have multiple blades you can interchange.
You need to consider the weight and balance of the unit. The brushless blades on a unit help increase the efficiency of the trimmer.

Warranty and Price

Consider the warranty of the trimmer you are purchasing. Some trimmers come with a limited warranty, while others have a full warranty. Finally, you need to consider the price. Trimmers can range in price from a few hundred dollars to a few thousand dollars.

Overview of The Milwaukee 2825 21st Trimmer

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Tech Specs

  • Brand: Milwaukee
  • Dimensions: 40 x 14 x 6.5 inches
  • Weight: 2.2 pounds
  • Power Source: Battery (18V Lithium-ion, 8.0 Ah)
  • Blade width: Adjustable

What’s Included

Includes string trimmer, two batteries, charger, shoulder strap, and operator’s manual


  • Lightweight and comes with an easy load trimmer head for easy adjustment
  • Brushless motor for increased power and runtime
  • The 18V lithium-ion battery for long run time and fade-free power
  • Variable speed trigger for maximum control
  • Adjustable cutting width from 10″ to 12″


  • Complaints of not being durable in the long run
  • Does not have a rotating head


The Milwaukee 2825-21ST M18 Fuel 18V Lithium-Ion Brushless Cordless String Trimmer Kit offers a brushless motor for increased power and runtime and an 18V lithium-ion battery for long run time and fade-free power. The variable speed trigger provides maximum control, while the adjustable cutting width from 10″ to 12″ allows you to customize your trimming experience.

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Summary of Key Features

Brushless Motor

The Milwaukee M18 FUEL 2825-21ST is a string trimmer that features a brushless motor. This type of motor offers several advantages over traditional brushed motors, including increased power, efficiency, and durability.

A brushless motor can produce more power than a brushed motor of the same size. This means you can finish more work with a brushless string trimmer in less time.

It also means the trimmer will require less power to produce the same amount of work. Brushless motors are more durable than brushed motors, meaning they will last longer and require less maintenance.

Battery Power

The Milwaukee string trimmer is powered by an 18V, 8 Ah battery. It has a variable speed trigger that allows you to control your speed and conserve battery life. It can usually last for about 2-2.5 hours of continuous trimming.

The trimmer is compatible with Milwaukee’s M18 (48-11-1880) battery system for easy replacement when the battery dies off.


The brushless motor delivers up to 27% more cutting power than the previous model from Milwaukee. The large, 21-inch cutting swath lets you trim more area in less time.

Its variable speed trigger gives you the ability to control the trimming speed, and its bump feed head ensures that your trimmer blades are not damaged when you run it over a hard surface like a gravel path (for instance).

Additionally, the trimmer includes a new debris shield that helps protect the user from flying debris when you accidentally run it over some.

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The QUIK-LOK Power Equipment feature in this trimmer helps connect the device to any socket in case you want to charge it or simply run it when wired.

It has an adjustable 32 feet cable length and is also quite handy to maneuver around the garden without worrying about finding a new socket every few minutes.

Other Features

The trimmer has an auto-feed line system that advances the line automatically when needed. It has a shoulder strap for comfortable use and a handle for easily holding it while reaching taller branches.

Another thing I loved about this trimmer is its durable carrying case for easy storage and transport.

Answers to Some Common Questions About The Milwaukee 2825

Does the Milwaukee Kit Come With a Shoulder Strap?

The Milwaukee trimmer kit has a shoulder strap for the user. This can help to trim long stretches of a garden while carrying the machine around.

Can the Trimmer Be Used for Dense Garden Trimming?

The Milwaukee trimmer can be very helpful even for dense trimming in lawns, patios, and gardens. However, it’s important to regularly trim the trees in your garden. This removes dead branches and lets the tree grow out new ones. Also, unkempt and unruly branches can cause accidents while walking in your garden.

Does the Charger Come in the Kit?

Yes. There is a charger included in the Milwaukee 2825 Kit. It can help when your trimmer runs out of power, and you do not have a backup battery.

Can the Batteries Be Recharged?

Yes, you can recharge the batteries in the trimmer. The Milwaukee trimmer kit comes with two lithium-ion batteries and a charger. It also has an extendable cable which you can connect to an extension cord for easier trimming.

Final Words

As a user of the Milwaukee 2825 21St Brushless String Trimmer, I highly recommend it to anyone looking for a high-functioning and reliable garden trimmer. The brushless motor has plenty of power to get the job done quickly and efficiently. The battery life is also very good, lasting 2-2.5 hours of continuous use.

The adjustable heads of the trimmer have helped me trim corners that were otherwise completely out of my reach, and it has helped clean up a lot of ground that I was simply missing out on in my garden.

The battery is also quick to charge, and the kit provides a replacement battery, so you do not run out soon. It is also lightweight and can be carried around the garden however you need.

I would rate it as one of the best trimmers in the market right now, perfect for most common uses. The QUIK-LOK feature makes it easier to use outdoors and can help when you are looking to trim a lot of areas. My rating for this product is a solid 4.5/5.