How To Fix Ryobi Battery Not Charging? – 5 Fixes!

Ryobi is a popular Japanese brand that manufactures cordless power tools and home cleaning devices. Ryobi powers all these devices with lithium-ion batteries with different amperage ratings. In this article, we will examine the Ryobi Battery Not Charging issue that has been frequently encountered in recent times and help you restore its functionality to the way it used to be. To solve the Ryobi Battery Not Charging problem, simply read our article in its entirety and follow the solutions step by step.

Power tools like drill machines, ratchet kits, framing nailers, table saws, fan blower, hand vacuum, string trimmers, etc., uses Ryobi 18V lithium-ion battery pack, while larger devices like push lawn mowers, pressure washers, chain saws, etc., powered by 40V battery.

All these devices will become useless if your Ryobi Li-ion battery stops charging. I recently faced a charging problem with my Ryobi 18V battery pack.

In this guide, I’ll teach you the various methods to revive a Ryobi battery (18V/40V) that won’t charge.

Why is My Ryobi Battery Not Charging?

If you leave your Ryobi battery without charging for longer, then the lithium-ion battery discharges below its minimum threshold. When you plugin in next time to a Ryobi charger, the charger goes into testing mode and then defective mode. This is the most common reason why a Ryobi battery won’t charge.

However, there could be some other reasons such as faulty wall adapters, broken or frayed charging cables, dirty charging terminals, and defective battery cells that stop Ryobi from charging.

How To Fix Ryobi Battery Not Charging?

Several fixes will help in reviving your Ryobi battery pack. Follow the solutions mentioned below to fix the issues-

1. Try A New Wall Outlet

Ryobi Battery Pack

If your Ryobi charger isn’t getting any power it means there is some issue with your wall outlet or power cord. Start your troubleshooting by testing your wall outlet first. Insert your Ryobi charger into a different power outlet to check whether your battery is charging.

2. Clean The Metal Contacts

Ryobi Battery Test

If the battery connections (metal contacts) are dirty, it will prevent the current flow. So, check the metal contacts on your battery pack and charger and clean them with sandpaper.

After cleaning the metal contacts, insert your battery into the charger again. If the testing light blinks red, your charger supplies power to the battery.

3. Jump The Charging Controller Circuit

Jump Ryobi Battery

Ryobi Li-ion battery has an overcharge protection circuit that controls the current flow. If you haven’t charged your battery for a long, it may have gone into sleep mode.

The charging controller circuit will automatically cut off the current flow if the battery discharges below its minimum threshold. To fix this, you need another Ryobi battery or charger to jump the controller circuit.

Follow these steps to jump and wake up Ryobi battery from sleep mode-

  • Unscrew the battery pack.
  • Test the voltage of individual cells with a multimeter to ensure the reading is above 3 volts.
  • Identify the positive and negative terminals of the battery connection.
  • Take another Ryobi battery of the same amperage and connect the jumper wire.
  • Touch the jumper wire with your dead battery for 20 to 30 seconds.
  • Test the voltage difference of individual cells again and connect the wire until it reaches 3 volts.

4. Remove And Insert The Battery Into Charger

If you don’t have a screwdriver set to jump the battery, you can repeatedly insert and remove the battery pack from the charger.

Here’s a video tutorial on how to do it-

5. Replace The Defective Cell

Ryobi Battery Voltage

Ryobi 20V battery pack has five lithium-ion rechargeable battery cells connected in series. When any of the cells is damaged or defective, it affects the performance of your battery pack.

The Ryobi battery goes into sleep mode if you don’t charge it for longer. It happens because the lithium-ion cells discharge below their minimum threshold.

When you insert the battery pack into the Ryobi charger, it tests the voltage and gives a defective battery error.

Another common reason is a faulty cell inside the Ryobi battery pack. You can test the voltage of individual cells and replace the defective ones.

How To Troubleshoot a Ryobi Battery That Won’t Charge?

If your Ryobi battery has gone into sleep mode, you need to jump the charging circuit with another battery. Also, a faulty cell inside the battery pack stops it from charging.

You can test the individual cells with a multimeter. If any of the cells have less than 3 volts reading, identify and replace that. Here’s a link for rechargeable battery cell replacement.

If nothing works, you may need to buy another Ryobi battery pack for your device. You can find replacement battery packs at most hardware stores or online retailers.


A Ryobi battery often goes into sleep mode in cold weather. So, you need to jump the battery pack with another battery or the charger. Once the lithium-ion cells revive, you can charge them normally.

I hope this guide helped in fixing the charging problem of your Ryobi 18V/40V battery pack.

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  1. JAMES H LAMBERT says:

    charger leaked a large amount of oil and then stopped charging. Is it time to replace?

    1. Yes, you have to get a new one.

  2. Norm Luscher says:

    Thanks SOOOOOOOO much. Home depot Reobi guy just gave me a number to call
    Ryobi. Of course it’s the weekend, so I checked the internet. Your information is so complete, even if I need to rebuild a battery pack. (I have done that for a vintage Heathkit radio). The 3 times test worked perfectly!! A BIG THANK YOU.

    1. That’s great!

  3. Lester Richardson says:

    My 40v ryobi weed eater battery charger blinks green 7 times then goes red. I’ve tried taking battery on and off charger 4-6 times. Still same thing.

    1. If you want a video solution, I leave the video link here. Thank you for your comment.

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