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Internet # 331504643

Model # AC8609340SB-R8656B

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18V MAX Output Starter Kit with (2) 4.0 Ah MAX Output Batteries and Charger w/ 18V Subcompact 6-1/2 in Circular Saw

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  • Includes: 18V (2) 4.0 Ah MAX Output Batteries and Charger
  • Includes: FREE 18V SubCompact Brushless 6-1/2 in. Circular Saw
  • Free Parts and Service for Life with Registration
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Product Details

About This Product

RIDGID introduces the AC8609340SB 18V 4.0Ah MAX Output Starter Kit with FREE 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw. MAX Output batteries facilitate battery and tool communication unleashing the full potential of any RIDGID 18V Brushless Tool providing more power and more runtime. The included RIDGID MAX Output 4.0Ah batteries will provide up to 3X more runtime and 2X more power compared to the 1.5Ah lithium-ion battery (AC870015). The RIDGID MAX Output 4.0Ah battery is compact and lightweight, which reduces user fatigue. Always be prepared for the job with the RIDGID 18V Lithium-Ion Charger. This compact charger features a smart charging indicator that will update the battery's charge status. For a more organized storage option, take advantage of the wall mount capability. Decrease energy consumption with this Energy Saving Charger and preserve your battery life with maintenance charging. As always, the RIDGID 18V 4.0Ah MAX Output Starter Kit is 100% compatible with all RIDGID 18V tools and chargers. Best of all, this kit is eligible for the Industry's Only Lifetime Service Agreement, simply register within 90 days of purchase for FREE Parts, FREE Service, For LIFE. This RIDGID kit includes an (2) AC840040 4.0Ah MAX Output Batteries, AC86093 Charger, and FREE 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw.

Highlights

  • Maximum Performance. Longer Runtime.
  • Battery: MAX Output Batteries provide up to 2X more power compared to the 1.5Ah lithium-ion battery (AC870015)
  • Battery: Up to 3X more runtime compared to the 1.5Ah lithium-ion battery (AC870015)
  • Battery: Advanced electronics and innovative cooling technology for extended battery life
  • Battery: Compact size reduces user fatigue
  • Battery: Fuel gauge displays power level on the job
  • Charger: Smart Charging Indictor evaluates the battery's charge and condition with easy-to-read icons
  • Charger: Compact and lightweight design for easy storage and transportation
  • Charger: Wall Mount capable for a more organized storage option
  • Charger: Decrease energy consumption with this Energy Saving Charger
  • Charger: Maintenance Charging keeps the battery charged and maintains overall life
  • 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw: 5,000 RPM
  • 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw: 30% Lighter Weight when compared to RIDGID's R8657 Brushless 7-1/4 in. Circular Saw
  • 100% Compatible: Works with all RIDGID 18V Batteries, Tools, and Chargers
  • Lifetime Service Agreement with registration within 90 days of purchase
  • Includes: (2) AC840040 4.0Ah MAX Output Batteries and AC86093 Charger
  • Includes: FREE R8656 18V SubCompact Brushless 6-1/2 in. Circular Saw, 6-1/2 in. Circular Saw blade, hex key, vacuum attachment with screw and Operator's Manual
  • RIDGID: Build for a Lifetime
  • Click here for more information on Electronic Recycling Programs
  • Click here for more information on Electronic Recycling Programs
  • Return Policy
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Product Information

Internet # 331504643

Model # AC8609340SB-R8656B

Additional Resources

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Specifications

Dimensions: H 7.56 in, W 8.86 in, D 12.91 in

Dimensions

Blade Diameter (in.)

6-1/2 in

Product Depth (in.)

12.91 in

Product Height (in.)

7.56 in

Product Width (in.)

8.86 in

Details

Battery Amp Hours

4 Ah

Battery Power Type

Lithium Ion

Battery Size

18-volt

Battery Voltage (V)

18V

Bevel Capacity (degrees)

50 °

Blade Location

Left

Charger Included

Charger Included

Color Family

Orange

Cordless Tool Type

Circular Saw

Cordless/Corded

Cordless

Included

Battery Included, Blade(s), Charger

Maximum Cut Depth at 45 Degrees (in.)

1.625 in

Maximum Cut Depth at 90 Degrees (in.)

2.25 in

Maximum Speed (RPM)

5000 RPM

Motor Type

Brushless

Number of Total Batteries Included

2

Power Tool Features

Depth Adjustment, LED Light, Variable Speed

Product Weight (lb.)

5.4 lb

Returnable

90-Day

Saw Drive Type

Sidewinder

Tools Product Type

Power Tool

Warranty / Certifications

Manufacturer Warranty

Lifetime Service Agreement

Questions & Answers

Is this an in-store deal?
ByJun 18, 2026
1 Answer | 
Answer This Question

Hello, Craig - This is the circular saw kit, which is available both in-store and online. If you need further support, then feel free to ask another question. You can also contact us by phone at 1.866.539.1710, Monday - Friday from 9am to 6pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw Kit with 4.0 Ah MAX Output Battery and Charger (R8656K).

By|Jun 19, 2026


    what depth does it cut at a 45 degree angle
    ByMar 18, 2026
    1 Answer | 
    Answer This Question

    Hello, Dennis - The maximum cut depth at 45 degrees is 1.625 in. If you need further support, then feel free to ask another question. You can also contact us by phone at 1.866.539.1710, Monday - Friday from 9am to 6pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

    By|Mar 19, 2026


      Do the recondition tools have warranty if so what kind
      ByJan 3, 2026
      1 Answer | 
      Answer This Question

      Hello, Rigit - Yes, reconditioned tools have a 1-year limited warranty. If you need further support, then feel free to ask another question. You can also contact us by phone at 1.866.539.1710, Monday - Friday from 9am to 5pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

      By|Jan 6, 2026


        Does rigid htools have a lifetime warranty
        ByDec 18, 2025
        1 Answer | 
        Answer This Question

        Hello, Rich - The products must be registered within 90 days of purchase in order to have the Lifetime Service Agreement (LSA). If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

        By|Dec 20, 2025


          What's the correct edge guide or rip fence for this? The one listed on her doesn't go to anything. It shouldn't be that difficult to find one without buying one and hoping it will work.
          ByNov 14, 2025
          2 Answers | 
          Answer This Question

          Hello, Damunk - The edge guide part number is 690119004. Available replacement parts can be purchased at https://ridgid.ordertree.com/. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

          By|Dec 25, 2025

            (1)

            So for anyone else looking it appears that Ridgid no longer sells one and you will have to guess on which Amazon part will fit. Ridgids part no longer exists. A brand new tool and they don't support the normal parts that go with it. Frustrated!!

            By|Jun 7, 2026

              (7)

              Will the AC840080 8ah Max Output EXP 8ah battery fit in this saw? Seems like it might be too big to fit in the space.
              ByJun 5, 2025
              1 Answer | 
              Answer This Question

              Hello, Jiminauburn - Yes, the AC840080 battery will fit in this circular saw. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

              By|Dec 25, 2025

                (1)

                What size is arbor?
                ByApr 28, 2025
                1 Answer | 
                Answer This Question

                Hello, Michaelj5960 - This saw's blade arbor is 5/8". If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

                By|Dec 25, 2025

                  (1)

                  Why is this 6-1/2" circular saw being called compact only in comparison to a 7-1/4" circular saw? Of course it's smaller than a larger saw, what is it compared to your other 6-1/2" circular saws?
                  ByFeb 20, 2025
                  2 Answers | 
                  Answer This Question

                  The R8656 is 5.4lbs The R8655 is 6.5lbs The R8651 is 7.9lbs R8655 vs r8656 dimensions compared below. Depth - 13.307" vs 13.19" Height - 7.953" vs 7.48" Width - 9.252" vs 7.99"

                  By|Feb 16, 2026

                    Hello, W1987 - This tool is 27% more compact and 30% lighter weight when compared to RIDGID's R8657 Brushless 7-1/4 in. Circular Saw. If you need further support, then feel free to ask another question. You can also contact us by phone or text at 1.866.539.1710, Monday - Friday from 9 am to 5 pm (EST), or via email when you visit us at https://register.ridgidpower.com/contact. This question is from RIDGID 18V SubCompact Brushless Cordless 6-1/2 in. Circular Saw (Tool Only) (R8656B).

                    By|Feb 21, 2025


                      Viewing 1-8 of 46

                      Customer Reviews

                      4.6 out of 5

                      • 4.6 out of 461 reviews
                      • 80% recommend this product
                      Filter by:
                      Showing 1-10 of 461 reviews
                      I was able to pick up this 6 1/2 in circular saw on clearance for $75, normally $150. I have used it for multiple projects around my home and it has preformed flawlessly. The sub compact size makes it perfect for my needs. Now I cannot speak to its use on any major type of construction, but it is very light weight and I would imagine easy to manage when working in places without readily available power or at odd angles.
                      by
                      • Verified Purchase
                      I was looking for a lightweight saw and boy did this come through. This saw is extremely light and has been a great addition to the workshop! Highly recommend.
                      by
                      This subcompact saw is smaller in every direction than my older Dewalt it is replacing. It is more powerful also, which is KEY for this tool. I got a great deal on it, and happy to add it to my Ridgid arsenal of awesome tools.
                      by
                      This saw is easy to use, stable and compact. Everything comes with it that you need. Ridgid is an incredible brand and has a remarkable warranty and service.
                      by
                      Powerful light saw.
                      Light & powerful. Blade on left/correct side. Cuts great. Bought with 2 batteries & lasts all day. I put a 1” connector & 3/4” 45.
                      by
                        • Recommended
                        Warranty don’t matter if it takes forever!
                        Broke quick. Sent it in off warranty. Took 6 weeks to get a replacement. And the replacement didn’t work. Sent that in 2 weeks ago, it’s Feb 2025 now, I expect to here back by nov/ dec
                        by
                        Response from RIDGIDFeb 7, 2025
                        Hello, Ragstar contractors - We're very sorry that you've had an unsatisfactory warranty experience! We’d value the opportunity to discuss your experience further and provide you with support. If you would, will you please email us at Reviews@RIDGIDmail.com? ridgidtti
                          3 found this review helpful
                          The saw was great not too big just right the size the weight just right for those small not too large projects around the house
                          by
                          • Verified Purchase
                          So far so good ... Handy light weight tool..
                          by
                          • Verified Purchase
                          Easy to use
                          I will start out explaining why I only gave this saw 4 stars. I understand it was sold as "tool only" however it came with no paperwork/instructions. I went to the HD website to figure out how to install the blade. The instructions said to refer to the diagram, but there was none. Anyway, once I got the blade installed, I was very impressed with how great the saw is. The handle is well padded and easy to grip. With an 18 volt battery (not included) the saw is well balanced and has plenty of power to handle any job. I am replacing a deck and this saw has come in so handy for on the site cuts.
                          by
                          • Recommended
                          1 found this review helpful
                          Light Weight. Compact. Cuts Nicely
                          Love this light weight saw. It does use a 18V Rigid battery. So you have to have that to get it to work. It comes with a blade and has all sorts of safety features in the saw. I never owned one of these before. I always was fearful in cutting myself due to size and weight. This saw curbs that fear. It is sharp, glides down your wood path and has a variety of safety features to stop cutting. I like that you can leave it in the box too. As a non-handy man, I usually leave my tools in their original box, if I can. It makes it easier to store them on a garage shelf. I don't have a big tool chest or wood working area to leave this out. Additionally, with my use, which will likely be only a few times a year as needed, it is a nice plus that it is compact! It will nicely be tucked away. I like that it can cut up to 2" depth and can be put on a angle. It has a safety/plastic guard and comes with a vacuum attachment too. I have already used it once to build a small step and it was so easy to handle. No cords. Not heavy. The directions are fairly easy to read. Rigid does a good job with that. They also have online video tutorials too. It has a lifetime warranty with product registration!
                          by
                          • Recommended
                          2 found this review helpful
                          Showing 1-10 of 461 reviews

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                          Product Snapshot

                          Great for homeowners looking for a cordless circular saw, making cuts easier and more efficient.
                          Built for long-lasting durability and high performance in demanding applications, this saw features a powerful 3, 500 RPM motor and a durable magnesium guard.
                          Ideal for professionals seeking power and portability, this saw delivers faster cutting than corded saws. Its lightweight magnesium construction and 53° bevel capacity ensure effortless handling and versatile cuts.
                          Ideal for professionals or homeowners needing a lightweight, cordless saw with long runtime and powerful cutting performance. This saw delivers faster cutting than 15A corded worm drive saws.

                          Blade Size

                          6-1/2 in
                          6-1/2 in
                          7-1/4 in
                          7-1/4 in

                          Cordless

                          Cutting Capacity

                          2.25 in at 90 degrees, 1.625 in at 45 degrees
                          2.125 in. at 90 degrees, 1.625 in. at 45 degrees
                          2-1/2 in. depth of cut, 53° bevel capacity
                          2-1/2 in. depth of cut, 53° bevel capacity

                          Motor Power

                          18V
                          3, 500 RPM
                          18V
                          18V

                          Speed Control