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Internet # 313303644

Model # 48-11-2131

Store SKU # 1005482694

REDLITHIUM Lithium-Ion Rechargeable USB 3.0 AH Battery

$24.99
  • Longer Battery Life With Up to 1,000 Recharges
  • More Capacity: Get 20% More Runtime Than Previous Generation
  • Compatible With All Milwaukee® USB Rechargeable Products
  • View More Details

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Return this item within 90 days of purchase.

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Product Details

About This Product

The Milwaukee REDLTIHIUM USB 3.0AH Battery provides more runtime, longer life and faster charging. This USB 3.0 battery pack delivers up to 20% more capacity for Milwaukee USB Rechargeable solutions compared to the First Generation REDLITHIUM USB Battery (48-11-2130). With a higher capacity, users get longer runtime and more power for performance in every Milwaukee USB Rechargeable solution. Eliminate the need for single-use batteries with these USB rechargeable batteries that deliver more charges for longer life out of a single battery. Get back to work faster with 3X faster charging times when charged by a Milwaukee USB Rechargeable product or the REDLITHIUM USB Portable Power Source and Charger (48-59-2012). The Milwaukee REDLITHIUM USB 3.0AH Battery is covered by a 2-year warranty.

Highlights

  • Powers Milwaukee USB rechargeable products
  • More capacity: get 20% more runtime
  • Longer life: 1,000 charges
  • Faster charging: 3X faster charge time (when charged with Milwaukee USB rechargeable products or REDLITHIUM USB charger)
  • Battery charge time is 2-hours inside Milwaukee USB rechargeable products or with 48-59-2012 REDLITHIUM USB portable power source and charger
  • 2-year warranty on REDLITHIUM USB battery
  • Includes: one 48-11-2131 REDLITHIUM USB 3.0AH BATTERY
  • Shop All Milwaukee Tools
  • Click here for more information on Electronic Recycling Programs
  • Return Policy

Product Information

Internet # 313303644

Model # 48-11-2131

Store SKU # 1005482694

Additional Resources

Shop All Milwaukee

Specifications

Details

Amp Hours (ah)

3 ah

Battery Capacity (mAh)

3000

Battery Power Type

Lithium Ion

Battery Size

Lithium Ion

Cell Type

Lithium

Features

Rechargeable

Number in Package

1

Returnable

90-Day

Use Type

Power Tool

Voltage (V)

4 V

Questions & Answers

Is it chargeable
ByApr 4, 2026
1 Answer | 
Answer This Question

Hi, Benney. Yes, the Milwaukee REDLITHIUM™ USB 3.0Ah Battery is fully rechargeable.

By|Apr 7, 2026


    do these work in heated jackets?
    ByJan 18, 2026
    1 Answer | 
    Answer This Question

    No, the REDLITHIUM™ USB 3.0Ah Battery is designed for Milwaukee USB Rechargeable products (like headlamps, flashlights, and personal lighting), not for heated gear.

    By|Jan 20, 2026


      Will this fit into my 4 year old Milwaukee 2161-21 flashlight?
      ByNov 19, 2025
      1 Answer | 
      Answer This Question

      Yes, the REDLITHIUM™ USB 3.0 AH Battery is compatible with your Milwaukee 2161-21 flashlight. The flashlight is designed to work with Milwaukee REDLITHIUM™ USB batteries, including the 3.0 AH version, which provides enhanced runtime and performance.

      By|Nov 21, 2025


        Does the battery the same size as AAA BATTERIES?
        ByOct 8, 2025
        0 Answer | 
        Answer This Question

        When the flashlight is plugged into a charging block the LED light goes to red to green rappedly, stay this way until you unplug it
        ByApr 5, 2025
        2 Answers | 
        Answer This Question

        Red-Discharged Low 25 Yellow-Discharged Med 50 Green-Discharged Hi 75 No Light-Finished Charging 100

        By|Jul 29, 2025

          Hey Doug! Shoot us an email at social.media@milwaukeetool.com with more details so we can assist you!

          By|Sep 5, 2025

            (1)

            Does the 3.0 ah replace the 2.5 ah battery
            ByDec 11, 2024
            1 Answer | 
            Answer This Question

            Hey, there! You can use the REDLITHIUM Lithium-Ion Rechargeable USB 3.0 AH Battery in place of a REDLITHIUM™ USB BATTERY, as they are all compatible with the USB tools.

            By|Sep 23, 2025

              (1)

              Does pa store Matamoras carry a 3.0 lithium battery
              ByOct 3, 2023
              0 Answer | 
              Answer This Question

              Can you have in carryon bag?
              ByApr 30, 2023
              0 Answer | 
              Answer This Question

              Viewing 1-8 of 23

              Customer Reviews

              3.9 out of 5

              • 3.9 out of 459 reviews
              • 40% recommend this product
              Filter by:
              Showing 1-10 of 459 reviews
              Do not buy
              Junk! Had it for a month doesn’t charge at all barley used it
              by
              Response from Milwaukee ToolJul 6, 2026
              Thank you for taking the time to leave a review on your REDLITHIUM Lithium-Ion Rechargeable USB 3.0 AH Battery and we are sorry to hear about your experience. Can you please send our team a message at social.media@milwaukeetool.com? Thank you - Milwaukee Tool Social Team
                We purchased this extra battery for the Milwaukee 500 Lumens LED Pivoting REDLITHIUM USB Flashlight. Milwaukee is a great brand with a high quality product line. We have purchased knock off brands once and never again. They did not hold a charge and the power level was too low, we couldn't even drill a hole through a piece of metal. We only buy Milwaukee products from Home Depot. Home Depot has fast delivery and wonderful customer service.
                by
                Poor service life
                I purchased a rechargeable light kit that included this battery, and I also bought a spare at the same time. In less than a year, both batteries have failed — they will no longer hold a charge or charge at all. This is extremely frustrating considering the cost of the kit and the additional battery. To make matters worse, I live in a remote location, so dealing with shipping or a warranty claim will be very difficult. I really like the light itself and have found it very useful, which makes it even more disappointing that the batteries have proven to be unreliable.
                by
                Response from Customer CareFeb 17, 2026
                Thanks for leaving a review. We're sorry to hear that both of your REDLITHIUM™ USB 3.0 Batteries are no longer holding a charge. A member of our team will be reaching out to you directly to assist further. - Milwaukee Tool, Social Team
                  brand new battery and light won't charge
                  Bought a brand new 2128-22 light that comes with the redlithium usb 3.0 battery. Put in on to charge overnight and it won't charge. Tried multiple cables including the one that came with it, no luck getting it to work. What poor quality control to let products ship defective.
                  by
                    Bad Battery For a Great Light
                    It's unfortunate that my Milwaukee headlamp works great and is well designed, except the battery life has always been terrible. I was going to buy a new battery, but judging by the reviews and my experience with this battery, I'll be forced to buy a new headlamp, and definitely not another Milwaukee. Milwaukee: I really like your gear, but please don't blemish your brand by putting crappy batteries in nice, expensive headlamps.
                    by
                    Response from Milwaukee ToolDec 1, 2025
                    Thanks for letting us know what is happening with your runtime. Our team is sorry to hear about the REDLITHIUM Lithium-Ion Rechargeable USB 3.0 AH Battery having trouble and would like to assist you. Please email us at Social.Media@MilwaukeeTool.com!
                      Misleading answer no action email
                      So Milwaukee sent me an email to refer to the posting in their reply, but on this public forum, they post giving the impression that there was a resolution met for this junk battery. This is now a review on the server. I’m receiving from Milwaukee on selling a piece of junk Because it’s a misleading.
                      by
                      Response from Milwaukee ToolSep 9, 2025
                      Hi, Jo. We're sorry to hear that you did not receive our email! Our team will send another email your way asap. Thank you for letting us know. - Milwaukee Tool, Social Team
                        Disgusted and Let Down
                        Well the problem I’m having seems to be quite common. Looks like Milwaukee is aware that this battery is complete junk. Leaves such a bad taste in my mouth that I may never spend another dollar on Milwaukee products again.
                        by
                        Response from Customer CareAug 28, 2025
                        Hey, Jay. Thanks for letting us know what is happening with your REDLITHIUM™ USB 3.0 Battery. We will email you with some questions, so we can gain more information and assist. - Milwaukee Tool, Social Team
                          Light your job got s a long time
                          Works great. Needed a second battery to prolong my work days into evenings or darker places. Last a long time with the designed head lamp. Quality stuff.
                          by
                          • Verified Purchase
                          • Recommended
                          NOT NOT BUY... BRAND NEW BATTERY DEAD !!!!
                          This is not a reliable or dependable battery. We bought both the light and a spare battery and the brand new never used spare battery DEAD !!!
                          by
                          Response from Milwaukee ToolJun 25, 2025
                          We're sorry to hear this about both of your REDLITHIUM™ USB 3.0 Battery packs. A member of our team will contact you shortly to learn more and assist. - Milwaukee Tool, Social Team
                            Replacement bettery unavailable to buy at Home Depot! One battery stopped working can‘t find replacement to purchase here in Hawaii.
                            Like the flash light, unfortunately one of the two batteries stopped working less than a year in, and remaining battery doesn‘t hold charge for long. Not top it off, I can‘t seem to buy replacement batteries at Home Depot here in Hawaii. Wish I knew before buying it.:(
                            by
                            Response from Milwaukee ToolMay 9, 2025
                            Hi, YM! Our team has been in contact with you regarding your REDLITHIUM Lithium-Ion Rechargeable USB 3.0 AH Battery. Thanks for the review.
                              Showing 1-10 of 459 reviews

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                              Product Snapshot

                              Ideal for customers who want more runtime and faster charging, ensuring reliable power.
                              Ideal for customers who want reliable communication, ensuring higher capacity in a smaller package.
                              Ideal for customers who want reliable, long-lasting power, ensuring extended work shifts.

                              Capacity

                              3000 mAh
                              1800 mAh
                              1800 mAh

                              Voltage

                              4 V
                              3.7 V
                              3.7 V

                              Rechargeable

                              Battery Chemistry

                              Lithium-Ion
                              Lithium-ion
                              Lithium-ion

                              Shelf Life

                              1, 000 charges