How to Recharge and Fix Ryobi 40V Battery

The majority of Ryobi’s outdoor power tools require a battery to operate. If these tools don’t work, it’s most likely because the Ryobi 40v battery isn’t charging properly. To resolve this issue, you will need to go through a series of troubleshooting steps.

Ryobi is a well-known Japanese company that specializes in automotive, electronics, and telecommunications components. The company is best known in the United States and Canada for its power tools, which are sold at Home Depot and on the internet. It provides drills, drivers, woodworking tools, and metalworking tools, among other things.

How can a Ryobi 40v battery be recharged?

The Ryobi 40v battery not charging problem is one of the most common issues that you may encounter when using Ryobi cordless tools. A fully charged Ryobi power tool, such as a weed trimmer, leaf blower, or mower, will usually perform flawlessly. The power tool will not work if the lithium-ion battery is not charged.

When the lithium-ion batteries do not charge, several factors can contribute to this problem, including the Ryobi battery being stuck in sleep mode, a faulty Ryobi charger, a dirty 40v lithium-ion battery or battery charger contact, or a defective old battery.

Method 1: Check for any corrosion on the contacts of the battery charger

If your power tool, such as a weed trimmer or blower, is constantly exposed to moisture, its metal parts are very likely to rust. When exposed to moisture, the battery contacts, which are made of metal, tend to corrode. This corrosion obstructs the flow of electricity, which interferes with the charging process.

Check to see if any rust has formed on the lithium-ion battery contact. If rust is present, it can be removed with extra fine sandpaper. Do the same for the battery charger’s contacts, as they may be corroded as well.

Method 2: Check if the battery has entered sleep mode

When a power tool is not used for an extended period of time, the battery has a tendency to go into sleep mode. This is most likely to occur if the lithium-ion battery has been discharged to a low level. When charging the Ryobi 40v system battery, you may only see the red and green lights on the charger flash. This indicates that the battery has been overcharged, and the charger is unable to determine whether it is healthy or not.

You will need another charged Ryobi 40v battery to repair this. This is the new battery, and the one that isn’t working is the old battery. Connect the positive (+) terminal of the old battery to the positive (+) terminal of the new battery with a wire. Apply the same logic to the (-) terminal. Keep this connected for 10-20 minutes. What will happen is that the new battery will charge the old one.

If you don’t have a spare Ryobi 40v battery, you can connect the battery charger to a power outlet. Place the battery in the charger until the green indicator turns solid, then remove the battery just before the red and green lights begin blinking. Rep to this step until the green light is constantly illuminated.

Method 3: Check if the Ryobi 40v battery is too hot or too cold

Lithium-ion batteries typically charge at temperatures ranging from 32°F to 113°F (0°C to 45°C). The Ryobi battery will not charge outside of these temperatures. If the battery is too cold, such as if you leave the power tool outside in the winter, you must warm it up to room temperature before charging it. If you leave the power tool out in the summer, the battery may become overheated. Before you can charge the battery, it must be cooled to room temperature.

Method 4: Check if the battery is old

Your Ryobi tool’s 40v lithium-ion battery has a set lifespan. A Ryobi battery, or any 40v lithium-ion battery for that matter, has a typical lifespan of two to three years, or approximately 300 to 500 charge cycles. A charge cycle is a period of use in which the battery is fully charged, discharged, and then fully charged again.

If the Ryobi 40v battery is more than three or four years old, it will have begun to degrade. It will no longer be able to hold a sufficient charge or, worse, will be unable to be charged. In this case, getting a new battery pack is the best option.

Following the steps outlined above, you will be able to successfully resolve the Ryobi 40v battery not charging issue.


I'm a content writer and writing for 5 years for multinational companies.

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