FSA 45 - $129.99 DSRP

Distributor Suggested Retail Price
FSA 45 w/ integrated battery

DSRP: $129.99


Reserve with STIHL Express for In-Store Pick Up

An affordable string trimmer including a built-in battery and adjustable shaft length.

With its integrated battery, the FSA 45 string trimmer is a great choice for occasional use on small properties. Part of the AI Series, the FSA 45 comes standard with the STIHL PolyCut™ 2-2 mowing head, making it ideal to cut in hard-to-reach places and large areas of tall grass. This STIHL AI Series trimmer is lightweight at only 5.1 lbs. (including battery) and can trim the length of three footb...Read More
Print Spec Sheets
FSA 45 Specifications
CUTTING WIDTH 23 cm (9")
RUN TIME (w/ Integrated Battery) With STIHL PolyCut™: Up to 20 min.
With line: Up to 12 min.
WEIGHT (w/ Integrated Battery)* 2.3 kg (5.1 lbs.)
*Weight without cutting attachment or guard. Comes with integrated battery and charger.
Model Features
  • Zoom
    Reduced-Emission Engine Technology - Caring for Nature
    The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as being cleaner than EPA and/or CARB exhaust emission standards.

    More Information

  • Zoom
    Compact, ergonomic design
    The compact, ergonomic design provides more comfortable use.
  • Zoom
    Lightweight Portability
    Great for maneuverability and extended use.
  • Zoom
    Hanging Loop
    Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing.

    See it in action!
  • Zoom
    Activation Key
    When removed, the activation key helps prevent accidental use/startup of the product. Battery will still charge with activation key removed – charge lights also work as well
  • Zoom
    Battery Indicator Lights 
    This product is equipped with built-in indicator lights, showing the battery status and remaining level of charge.
  • Zoom
    Rubberized Soft Touch Handle 
    Soft rubber texture is both easy to grip and makes the product comfortable to hold for extended periods. 
  • Zoom
    Loop Handle
    A thumb screw allows the ergonomic loop handle to be easily adjusted to desired position without tools.  

Important Information
WARNING! Improper use of any trimmer/brushcutter can cause serious or fatal injury. Read, understand and follow all safety instructions in your instruction manual. To reduce the risk of injury from blade contact, circular saw blades may be used on FS brushcutters that have a limitstop, a bicycle handle and double shoulder harness and not on FS brushcutters with a "J" handle or loop handle. Other rigid blades may be used on FS brushcutters having a bicycle handle, a "J" handle or a loop handle equipped with a barrier bar. To reduce the risk of eye injury always wear proper eye protection. Always use the appropriate deflector for the type of cutting attachment, as explained in your instruction manual.
Note: STIHL engine products with the Caring for Nature logo are cleaner than EPA Standards for exhaust emissions.
WARNING! Improper use of any power tool may cause serious or fatal injury. Read, understand and follow carefully the operating and safety instructions in your instruction manual before using such products.

STIHL products sold through U.S. STIHL Dealers are for distribution in the United States only.
Click to view the STIHL Limited Warranty Time Periods
We Also Suggest
For Your Safety
  • Camo Glasses Zoom
    Camo Glasses
    Style and protection come together with STIHL Camo Frame Glasses. These eye protection goggles are wrapped in camouflage print and provide 99% UV protection. Soft rubber temple tips and nosepiece help maintain fit and while reducing slippage.
  • STIHL Landscaper Series™ Gloves Zoom
    STIHL Landscaper Series™ Gloves
    Exclusive deerhide leather provides fantastic wear properties and excellent sense of touch and feel. Naturally soft leather provides all-day working comfort. Sizes available S, M, L, XL.

Are You Ready for a STIHL?

FSA 45 is rated 3.1 out of 5 by 65.
Rated 1 out of 5 by from Disappointed I purchased this product because of its nice design, great adjustability features and size. And it was cordless. I have a smaller yard that I needed something to edge with. I went through the whole pack of 6 plastic proprietary blades to do less than 200 feet. I tried using the regular line. But those snapped off at the head within 10 feet each time. After charging overnight, the battery lasted only 15 minutes. An hour charge lasted 5 minutes. I charged twice just to finish. So I returned this item and bought a corded trimmer. Not sure why this product made it onto the sales floor.
Date published: 2018-07-24
Rated 5 out of 5 by from FSA-45 No more tied to a power cord, noisy 2-cycle engine or filament style that never advance filament length correctly. I love how blades are equally effective and exchange so easily. So tired of fussing over filament spools for simple home yard work. Why did I take so long to buy a Stihl?
Date published: 2018-07-04
Rated 2 out of 5 by from this product is lightweight OMG I thought this was going to be the best when I tried it on for size in the store. Received as a gift and tried it outside, I did not get through weed eating my yard in 3 charges. Battery does not last long enough and the majority of my trimming is along driveway, sidewalks and decorative rock landscape, so needless to say I have to replace the plastic blades quite often. The versatility of length and turning capabilities is great. But the amount of time I now have to spend weed eating is much longer due to low battery issues. I do not have a big yard, but lots to trim around. I sure hope the blades are cheap.
Date published: 2018-07-01
Rated 5 out of 5 by from Awesome Weed Eater Bought a FSA 45 from the local ACE Hardware. The Stihl works great! We really like the blades - alot better than having to use the cord. Lightweight and has plenty of power. Cut down a 1/2 acre of Johnson grass with two charges on the battery using the same blades both times.Happy Consumer in Texas
Date published: 2018-06-25
Rated 1 out of 5 by from Lost key It worked great once until the key popped out never to be found again and now it won’t start. Ridiculous design!
Date published: 2018-06-22
Rated 1 out of 5 by from Not happy The blades on this trimmer are crap. Can’t put a spool in. Not happy. Would not have purchased if I would have known how crappy the blades were. Have to loop string in if I want to use string.
Date published: 2018-06-20
Rated 2 out of 5 by from Blades are not durable Have only used product once. My yard is not large or extreme in edging requirements. The blades wear down WAY too fast. Edging usually means trimming close to fencing, concrete, etc...... and these blades are woefully inadequate for this purpose. Everything else could be perfect but if one critical component ‘fails’ routinely then the entire package is wasted. Make the blades longer and stronger....please.
Date published: 2018-06-16
Rated 4 out of 5 by from bad design It's a quality Stihl product. I love Stihl products but, this trimmer has blades instead of line for trimming. Just bought and don't want to use it anymore. They are very harsh. If i wanted harsh I would have bought a gas trimmer.
Date published: 2018-06-10
Rated 5 out of 5 by from Working well for me This works well for me, I can't start those gasoline trimmers, about a 20 minute charge is enough for my yard.
Date published: 2018-06-08
Rated 2 out of 5 by from Avg Homeowner??? I thought this would be all the trimmer I need for average Homeowner. Wrong, I get frustrated every time I use it. Charge does not last long enough to finish my lawn; edging sidewalks & trimming around landscape edging.The blades DO NOT LAST long enough. I go through approx. 4 sets a weekend. They are not cheap, either and hard to find. My Hardware store that sold me the trimmer, never has them and closest lawnmower shop is 5 miles away. Also, as they get close to the end, they the ends fall off in the lawn or sidewalk.I have purchased blades on-line, "made in china???" version and much cheaper, but do not last as long as the Stihl blades.
Date published: 2018-06-08
Rated 5 out of 5 by from Light in Weight yet Heavy Duty You won't need a back brace maneuvering this trimmer and your arms won't be fatigued either. Having over twenty years of Professional Landscaping experience, I've used more expensive trimmers that weighed more than twice again as much, and frankly string trimmers are a nightmare when then start going bad. The two blade system cleared undergrowth without a hitch and proved to be more durable than I imagined. The no-nonsense rapid charging was clear, concise, and the battery life when fully charged outlasted the project. You can buy less expensive trimmers and you'll be disappointed. You can spend even more and get a heavy gas powered unit that won't be as convenient or as easy to operate.
Date published: 2018-06-06
Rated 5 out of 5 by from Great Trimmer I know Stihl been around for a long time and have great types of equipment that meet the customers need. I have been using Black & Decker trimmer in the past and want to change it to a better one. I am staying with Stihl brand after I tried the trimmer twice and it was better than my old one.
Date published: 2018-06-05
Rated 5 out of 5 by from Light weight and don't have to mess with string I have had the unit for 1 1/2 yrs. and love it. It runs about 20+ minutes on a charge and about 2 hours to recharge - that is perfect because I can recharge also - works great on small areas - I have used 2 sets of blades in 1 1/2 yrs. - told an older couple about the trimmer and they purchased one and love it
Date published: 2018-06-05
Rated 2 out of 5 by from May be better off with real string trimmer The plastic cutting blades on this unit do not stand up to rocks and other hard objects. My property has many rocks so i went through three sets of blades in 15 minutes of cutting. Unlike an actual string timmer, there is no automatic feed or bump feed - its called stop, invert, and replace the blades (although there is handy on-board spare blade storage) - very time consuming. I immediately returned it and bought another brand. I suppose if you have only grass to cut with no hard objects to maneuver around, this may work for you - it is very light and the adjustable shaft is nice, and there is no external battery to deal with. Oh, and the ability to use actual trimmer string with this tool; rather cumbersome. Don’t like the safety key - misplace it and you’re done. Beware of the 7 day return policy.
Date published: 2018-06-03
Rated 5 out of 5 by from Great Trimmer This is a great choice for the right application. I have a small yard with light trimming needs and this works great. Lightweight, quiet and easy to use. Probably not designed for really big yards but for me it’s perfect.
Date published: 2018-06-02
Rated 1 out of 5 by from Running time too short!!! I was wanting a light weight battery trimmer. Store personnel excited about this. Said 30 min to 35 min running time.. No way!! It was about 15 minutes the 2 times I used it. I have a lot of lawn and love to trim but this is not acceptable. IF I can clean it up I will take it back..Feel it should be returnable as is. So disappointed. My present one runs about 45 min...
Date published: 2018-05-29
Rated 2 out of 5 by from Lousy runn time per charge It took 3hrs to fully charge the battery out of the box. First cutting with plastic blades lasted about 40 minutes. After 1.5 hours on the second charge, the 3rd led light was still blinking. Used to anyway and got 15-20 minutes of run time. Considering the price, it is a huge disappointment. Manuals are way understating performance.
Date published: 2018-05-24
Rated 3 out of 5 by from I feel like I feel like it’s a good machine on power wise. But the battery does not stay charged long enough to finish the job. It takes two charges to do my yard. It has good power cutting the bigger stuff like kosher weed about quarter inch thick. Any bigger it has problems. So it is good for grass and smaller plants. It’s lightweight. The blades are a little pricey for how long they last. But overall I say gets the job done. If they have a bigger charge life I believe that I would be satisfied with it. I just got it so I will see how long it lasts and how durable it is.
Date published: 2018-05-16
Rated 1 out of 5 by from Piece of Crap It's a waste of money. The battery won't last no time and it takes over 4 hours to charge it. The plastic blades are nubs in 15 minutes. I even tried using the line which is hard to put into the head and takes 10 minutes to thread into the head. I was tired of dealing with gas trimmers since the gas they use these days clogs up the carb. Get a decent gas trimmer.
Date published: 2018-05-09
Rated 5 out of 5 by from Great Trimmer I am a Stihl employee, I will try to be as unbiased as possible.I do not have a very large area of lawn, I figured that the FSA45 for my need in a trimmer. This being a fairly new product I have to say that for the price and the fact that it is battery powered, I am literally surprised at the length of battery time. I can actually complete my yard, my daughter in laws yard and still have battery left. Extremely pleased with my grass trimmer.
Date published: 2018-05-01
Rated 1 out of 5 by from Bad choice. Requires .065 line and optional plastic blades destruct readily. Have owned many trimmers and this is the absolute worst. .065 line is too lightweight for even my small residential yard. Plastic optional blades wear down almost immediately. Company would say I am using it wrong. NOT.Will be going back to gas and a different brand. Do not want to chance another of their brand .
Date published: 2018-04-12
Rated 5 out of 5 by from Very impressive After reading the reviews I was not sure this was the trimmer to buy , after going to the store and checking it out I did purchase and it is better than I had hoped , I think the problem people have with it is they treat it like a line trimmer and get to close to metal , concrete , etc , their is no line to bump out to continue on , I have a small yard but do have a concrete slab , trees , metal pipe , if you take it easy and not keep it up against the the obstacle it is a dream trimmer , I hit all the obsicalaes and the blades are fine and I love that if you do run out of blades you can put some line in and finish the job , Great trimmer
Date published: 2018-04-07
Rated 3 out of 5 by from Not in love with it I wish it had string instead of the plastic blades. The blades wear down really fast, especially if you are trimming next to a hard surface-which is most of the time. When the blades come into contact with the ground it either stops or wants to walk on you- cutting some random stripe in the yard. It's very difficult to edge with and using it like that will mow through the blades. However, the blades are super easy to change and I like the simplicity of being battery powered. Starts every time and it's pretty light. The rotating head and shaft is a nice feature that gets used.
Date published: 2017-10-18
Rated 1 out of 5 by from This product has advertised great features but does not deliver! I will be returning this trimmer tomorrow. I have a small yard and had to restring it 8 times when half done, so gave up on that. Bought larger diameter string but it snapped off after two feet. The centripital force causes the slot to act as a razor and slices the plastic string off. Then tried the plastic blades provided. Machine would shut off after 2-3- feet. Not a good investment and a surprisingly poor STIHL prodeuct. Extremely disappointed!
Date published: 2017-09-28
Rated 4 out of 5 by from The product works very well, but the battery could use a little more longevity I have a simple yard with two walkways, and about 6 bushes to trim around. The big thing is driveway edging. My driveway is about 125 feet long (250 total), and I can't do trimming and edging on one battery charge. This might be unfair because the "average" driveway isn't than long, and for those, the battery would probably make it just fine. And, it gets through all but the last 50 feet. The product is light weight, and does a good job. Overall, I'm very happy; I just need to know that I'll have to charge it again if I do both wacking and edging on the same day. No big deal.
Date published: 2017-09-14
Rated 1 out of 5 by from Long charging time for little use I could not be more dissatisfied with the Stihl FSA 45 trimmer. It takes 3 1/2 hours for a full charge which only lasts 20 minutes. If it is not allowed to cool down before beginning the charge, red indicator lights come on. I was under the impression that Stihl products were of good quality, but sadly this is not the case with this trimmer.
Date published: 2017-08-31
Rated 5 out of 5 by from I found my trimmer Recently I suffered a stroke. The person I once was is no more. I no longer have the strength to carry a large trimmer for a long period of time. I even bought an electric trimmer to see if I could handle it. I would have to pull out 150' of power cords and after trimming. I would be exhausted. One day, I noticed my neighbor with a battery powered trimmer and he just zipped around trimming his grass. Luckily Stihl was selling the FSA 45 at what I considered a price. I bought it and tried it out. Now I just have light grass to trim around bushes and sidewalks, but it has answered my prayers. It is light, and can use poly blades or trimmer string, but I have been using the poly blades and they have done the job. It's easy to use, again light to carry and I don't have to lug all that cord out each time I trim. I have used it throughout the summer and can't find fault with it. For light trimming this is the real thing.
Date published: 2017-08-25
Rated 5 out of 5 by from My wife wanted one for her. Birthday to help me keep up with the trimming around our place. She loves it, the light weight and quiet running. We have had the trimmer for three weeks but cannot find anyone that carries the replacement blades. The dealer where we bought it keeps promising they should be in next week, but not yet. Also it looks like the blades are quite pricey. So be sure to consider the aftermarket cost and hassle when buying.
Date published: 2017-08-24
Rated 1 out of 5 by from Can't get blades. Wears out blades rapidly Can't get blades. Wears out blades rapidly. Very disappointed.
Date published: 2017-08-22
Rated 4 out of 5 by from My 6 year old LOVES it!! The FSA 45 was a replacement for my 6 year old son's 20v Black & Decker weed trimmer. He absolutely loves the features of his new Stihl trimmer, a Stihl man through and through! After he proved to me how to safely operate a battery trimmer along with understanding basic operations and maintenance of his previous trimmer would I consider upgrading his tool to something a little nicer. As his parent I really appreciate Stihl engineering a "key" that can be taken out of the trimmer to prevent my son from accidentally endangering himself or someone else when I'm not around to supervise him. The run time is decent on the 18v as long you don't go crazy trying to cut over-growth or something. The trimmer is feature rich with extra plastic blades attached to the bottom side of the trimmer, ability to convert to edger, adjustable shaft, and adjustable head makes for a very ergonomic trimmer. I myself have the 36v straight shaft trimmer, 36v blower, and 36v hedge trimmer. Great tools Stihl!!
Date published: 2017-08-15
  • y_2018, m_9, d_22, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_65
  • loc_en_US, sid_fsa45, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_stihl