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18V 4.0 Ah MAX Output Lithium-Ion Battery

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  • MAX Output Batteries Provide More Power and More Runtime
  • Compatible with all RIDGID 18V Tools ad Chargers
  • Free Parts and Service for Life with Registration
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Product Details

RIDGID introduces the AC840040 18V MAX Output 4.0 Ah Lithium-Ion Battery. MAX Output batteries facilitate battery and tool communication unleashing the full potential of any RIDGID 18V Brushless Tool providing more power and more runtime. This battery will provide up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015). The Advanced Intelligent Electronics in MAX Output batteries enable users to power through the most demanding applications on the jobsite. The RIDGID MAX Output 4.0 Ah battery is compact and lightweight, which reduces user fatigue. As always, this RIDGID MAX Output 4.0 Ah battery is 100% compatible with all RIDGID 18V tools. Best of all, this battery is eligible for the Industry's Only Lifetime Service Agreement, simply register within 90 days of purchase for FREE Parts, FREE Service, For LIFE. Charger sold separately.
  • MAX Output Batteries provide up to 2X more power compared to the 1.5 Ah lithium-ion battery (AC870015)
  • Up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015)
  • Advanced Intelligent Electronics and innovative cooling technology for extended battery life
  • Compact size reduces user fatigue
  • Fuel gauge displays power level on the job
  • 100% Compatible: Works with all RIDGID 18V Batteries, Tools and Chargers
  • Lifetime Service Agreement with registration within 90 days of purchase
  • Includes: (1) R840040 18V 4.0 Ah MAX Output Lithium-Ion Battery and operator's manual
  • Charger sold separately
  • RIDGID: Build for a Lifetime






  • Click here for more information on Electronic Recycling Programs
  • Return Policy
  • California residents

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From the Manufacturer

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Specifications

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Questions & Answers

56Questions
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Q:I am trying to place an order the sale ends tonight at midnight The Internet number is318211668 and the SKU number is1006713257. And the model number of the batteries is.Ac840060 my question is, can I get them for the same price when they become available
by|Dec 4, 2022
0 Answer
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Q:Can these batteries be used with the rigid 9 gal cordless vacuum?
by|Nov 24, 2022
1 Answer
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A:  Hello, Norell - Thank you for your question. If the vacuum is 18v then, yes. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V Lithium-Ion MAX Output 4.0 Ah Battery (2-Pack). - Jewel

by|Nov 30, 2022
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    Q:1) Can I use the 18V 4.0Ah battery to replace my 18V 2.0Ah that my Ridgid drill came with? 2) Does the 4.0 Ah provide more Power and longer Life than 2.0 Ah?
    by|Nov 2, 2022
    2 Answers
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    A:  Yes all ridgid 18v batteries are interchangeable,the larger amp hours last longer and provide more power.

    by|Nov 9, 2022

      A:  Hello, Ellis - Thank you for your question. Yes, you can use a 18V 4.0 battery instead of the 2.0 battery. The 4.0 AH battery will provide more power and a longer run time. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 4.0 Ah MAX Output Lithium-Ion Battery. - Courtney

      by|Nov 2, 2022
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        Q:How about including WEIGHT in the specifications for all the RIDGID batteries? Wouldn't that be a convenient thing for the customer. I'm sure everyone else was as eager to learn the length, width, and height of the battery!
        by|Oct 25, 2022
        1 Answer
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        A:  Hello, Puzzled - Thank you for your question. The 2Ah weighs less than a pound. Higher amp hour batteries may weigh around 1-3 pounds depending on how large it is. I hope this helps! Additionally, if you need further support, then a RIDGID Customer Experience Professional is here for you, Monday - Friday from 9 am to 6 pm (EST) when you call or text us at 1.866.539.1710 or through email or live chat when you visit us at https://register.ridgidpower.com/contact. And thank you again for your interest in the 18V 2.0 Ah MAX Output Lithium-Ion Battery. - Jewel

        by|Oct 26, 2022
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          Customer Reviews

          4.7 out of 5
          (419)
          • 4.7
            out of 419 reviews
          • 95%recommend this product
          Filter by:
          Showing 1-10 of 419 reviews
          HELPS MINIMIZE BATTERY SWAPPING
          If you have one or more of the Ridgid line of 18V cordless tools, this battery will give you extended use without needing to recharge or swap batteries. Rated at 18V, 6 Ah, the Lithium-Ion battery is claimed to be compatible with all the Ridgid 18V tools (I can verify that is true for their ½ inch drill motor, ¼ inch hex drive impact driver, receipt saw and oscillating multi-tool). Compared to the 2 Ah versions of the 18V battery, the 6 Ah battery is, understandably heavier, though at 25.8 oz. the weight tradeoff for more capacity is reasonable. It is 60-80% heavier than the 2 Ah versions, but the balance when using the tools (even the smaller ones, such as the impact driver) is still good, due to the weight being below one’s grip. As on other of the 18V batteries in this line, there is a four (4) bar charge indicator. As received, it showed one (1) bar, and took approximately 2 hours to fully charge it to the four (4) bar indication. The battery is eligible for the Lifetime Service Agreement (LSA), which requires registration of your battery, but will provide for free replacements should it become unusable. This is in addition to the three (3) year warranty against defects. If you find you are frequently having to stop and change or charge batteries, this will save you a lot of time, allowing you to continue to work.
          by
          • Recommended
          3 found this review helpful
          Great little power plant
          I was happy with my Ah Max Output Ridgid battery - both for its power and longevity but needed to add another battery to my tool set to keep one always charged. Ridgid simply makes great stuff and I am very satisfied with this 6Ah version. Lots of power and longevity! Plus, I really like the battery’s built-in level check - very convenient! Highly recommended.
          by
          • Recommended
          Awesome Battery, Long Run-Time
          Another great battery in the Ridgid lineup. I have other batteries from them and have always been happy with their performance, but this new 6AH battery is amazing. It charged out of the box in around 1 hour. I used it in a reciprocating saw and it lasted all afternoon while trimming branches. The LED display shows you the amount of charge. The battery easily slides in and out of the tools using the release tabs. It is also the same size as the other batteries I have, which is nice. I also felt no noticeable weight increase with this larger AH battery, a common complaint with larger batteries. Overall, a great product!
          by
          • Recommended
          My first 6Ah battery. Lots of power, not too big or heavy!
          Before using this battery, I charged it using the RIDGID R86093 battery charger. The battery shipped charged at one light on the LED power gauge. The time needed to charge the battery to full was around 3.5 hours. The battery pack has an easy to see 4-LED power gauge that displays the remaining power levels. The LED power gauge blinks as the battery is charging to let you know the level of charge completed. I am guessing, based on my charge time that a fully discharged battery would take about 4 hours to completely charge using my RIDGID R86093 battery charger? I used this battery on my RIDGID Multi-Tool while cutting ½ inch plywood and 1-inch rough cut cedar and had no issues. The cuts were quick and clean! When buying tools, I usually get a “bundle”, a tool or two, batteries, charger and maybe a case. But the bundles come with 1.5Ah or 2Ah batteries to keep the package price low. What’s nice about this 6Ah battery is you get much longer run times plus added power. Based on battery cell technology, this 6Ah battery delivers improved performance compared to ones with a lower Ah rating. The battery pack looks like it has vents built into the housing to help with heat buildup when using your tools continuously. The size and weight of the battery worked well as a balance with my multi-tool. If you don’t want to stop and switch out batteries while working on a large project get this battery! This RIDGID 6.0 Ah battery is 100% compatible with all RIDGID 18V tools, and it comes with a Lifetime Service Agreement, simply register within 90 days of purchase for free parts, free service, for life.
          by
          • Recommended
          2 found this review helpful
          Beast Mode
          This is the first battery I've ever used rated at 6ah. I successfully used it to power the 1/2 in drill/driver. My project was to drywall a basement of about 16 x 20- including ceilings. Even after a few undo's and redo's, I still had 2 bars left on the battery. It's a pretty big battery, but still, that's a lot of work for a single battery of any capacity. Can't wait to see what else I can do with this animal. Very pleased and surprised how much this can do. Nice to have a battery that can go the distance without having to be charged at lunch time.
          by
          1 found this review helpful
          6Ah Max Output Beast
          I work for a company that does Commercial Network Infrastructure. When I grab a drill and head up into a crawlspace or underneath a building, I check to make sure I have a 6Ah battery. I know I’ll get the time & power I need.
          by
            • Recommended
            1 found this review helpful
            Fantastic Hi-capacity Ridgid 18v Battery
            I received this battery through the Home Depot Seeds Program, and I've gotta say that Ridgid did it right with their new 6Ah battery. All of my power tools are now Ridgid, and many are cordless. That means that I need batteries...lots of batteries! I believe this one makes #10 so I'm never at a loss for cordless power, what with 3 chargers as well. What I love about this new 6Ah battery is that it's the exact same size and weight as their 4Ah battery, which is a major win for me! The 9Ah is a monster, and I decided I didn't want to lug around that weight, but with this 6Ah battery, I can handle it all day just like the 4Ah but with significantly more runtime. And it's a MAX battery too?? Yes, I highly recommend this battery.
            by
            • Recommended
            1 found this review helpful
            Great battery
            This 18v 6.0 Ah lithium-Ion Battery is very nice. It's not very heavy. I had to look up the actual weight online and it weighs in at 2 pounds. Which is not to bad for this size battery. It works in all Ridgid 18 v tools. Lasts along time. In my impact gun I can go all day with it. My reciprocating saw not as long depending ow much sawing I'm doing. Good batteries.
            by
            • Recommended
            1 found this review helpful
            Rigid Battery is a great size and weight for 6 amp hour
            This Rigid 18 volt battery is just what you need for things like the Rigid circular saw or the 1/2 inch hammer drill and the recharge time is short when you are done. All of the Rigid batteries are interchangeable so there is no hunting for the right battery when your in a hurry or you are far from a recharger or somewhere where there is no power to recharge.
            by
            • Recommended
            Great battery!
            The RIDGID brand 18v 6.0 Ah Max Output Lithium-Ion Battery really delivers. It is compact in size and not too heavy. It attached easily to any RIDGID tool as well as the charger which you will need to purchase separately. The battery holds its charge longer than most batteries and comes with the company’s Lifetime Service Agreement for parts and service.
            by
            • Recommended
            Showing 1-10 of 419 reviews

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