Lawn tractor battery box. Explore all Lawn Mowers

Have a Ryobi Battery That Won’t Charge? You Can Fix That.

Lithium ion batteries are a wondrous invention that are lightweight and long lasting. But it’s infuriating when the battery won’t recharge. You stick the battery in the charger and. nothing. Guess what? You can fix these batteries that appear to be completely dead. Read on.

This post is NOT sponsored by Ryobi. They do not approve of or endorse this method for fixing a Ryobi battery. AT all.

One of two things are going to happen as you read this post. You will either unfollow me due to my pathological boringness or. you will propose marriage. So get ready to act accordingly.

If you have any sort of cordless power tool, but especially one powered by a Ryobi 18V battery, you have no doubt encountered the dreaded flashing red charger light.

And if you haven’t. you will.

It inevitably goes like this. you run to the basement to grab your cordless drill because after 10 years of thinking about it, you’re finally going to build that 4 level, Tudor style treehouse with kitchenette.

Or you’re going to hang a picture.

Either way you put your battery in the charger and all you get is a flashing red light, which according to the label on the charger means your battery is defective. It isn’t just dead. It’s defective.

I’m here to tell you you it isn’t. You probably left it in the charger too long which drains the battery.

Your battery is fine. It just needs a little boost.

You Can Fix a Rechargeable Battery That Won’t Take a Charge.

You heard me right. You do NOT have to buy a new 50 battery. You do not have to call the company and swear at them because this stupid defective battery is only 2 weeks old. (although by all means feel free to do so) You do not have to wait until they ship you a replacement battery to finish your project. You can get that battery up and working in about 5 minutes.

NOTE: First try pulse charging.

Pulse charge your battery by plugging and unplugging your charger (with the battery in it) for 10 seconds. Try this a few times. If it doesn’t correct the problem, continue on with this tutorial.

How to Fix an 18V Battery

What You Need

• A multimeter. (this is actually optional but helpful. if you don’t have one don’t worry, you can still fix your battery)

Note: If you aren’t used to doing this sort of thing, or using things like a multimeter this is going to seem crazy and hard and way out of your DIY league. It isn’t.

Step 1. Cut the end off of your AC adapter. That’s right. Just cut it off. It’s for a 10 year old cell phone, you’re never going to use it again anyway. It’s frankly kind of weird that you saved it to begin with.

Step 2. Separate and strip off 1 of each wire. You have just made booster cables! Good for you.

Black wire = negative Striped or solid white wire = positive

IT IS VERY IMPORTANT TO NOT MIX THE TWO UP.

Step 3. Remove the screws holding the battery together.

For Ryobi batteries it’s a star shaped screw head like the one below.

A few years ago I bought a kit of small screwdriver heads from Amazon that has every small, weird, head you’d ever need.

There’s a hidden screw under a piece of plastic. You need to pry the plastic off to get at the screw underneath. I used a very thin screwdriver to pry it off.

Step 4. Pull the top off of the battery case.

Step 5. Remove the 2 plastic side pieces. They’re the things you press in to remove your battery from your drill.

Step 6. Lift the battery pack out.

Step 7. Set the Multimeter to read volts. For testing an 18 volt battery choose the 20 volts setting. This will give you the most accurate reading. (If you don’t have a multimeter skip to Step 9 and hope for the best)

Volts are symbolized by a V with one or two straight lines over it on a multimeter so it’s that section of the multimeter that you use. The section under the V with the straight line(s). Not the squiggly line. The straight line.

Step 8. Touching the red probe to the positive (red) terminal and the black probe to the negative (black) terminal, read the voltage shown on the multimeter. In my case the battery was carrying a charge of 0.06 volts. Which is almost nothing, but not completely nothing.

Step 9. Plug your AC adapter in and using the wires, boost your dead battery. Just touch the black wire to the negative terminal (the one with the black wire going to it) and the white wire (or striped wire) to the positive terminal (the one with the red wire going to it). Do this on and off for approximately a minute.

Apparently lithium ion batteries should be pulse charged. Which means you hold your wires down for 15 seconds or so, then release them. Then hold them down again. Over and over.

DOUBLE CHECK THAT YOU ARE TOUCHING POSITIVE TO POSITIVE AND NEGATIVE TO NEGATIVE.

Step 10. Test your the voltage on your battery pack again. It should be higher than it was before boosting. (Again, if you don’t have a multimeter don’t worry about this. you’ll just have to press on without one)

Mine went from 0.06 volts to 7.58 volts after a minute long boosting session.

Step 11. Put the plastic cover back on the battery pack (just the part that goes into the charger) and set your battery on the charger to see if it will take a charge.

If you still only get a red flashing light and the battery won’t charge, boost the battery some more. I find the battery charger will recognize that the battery is good again when you boost it to between 10 and 14 volts.

Just keep repeating the pulse boosting and testing the battery until it will finally be recognized by the charger and you get the green light.

To those of you who found this subject matter to be on par with spending 3 hours in a waiting room, sorry ’bout that.

For the rest of you? I know exactly how you feel. I felt the same way. Let me know exactly how elated you were after you brought your first battery back to life in the Комментарии и мнения владельцев section.

Here’s a 3 minute tutorial video showing me as I fix my own battery.

How to Fix a Ryobi 18v Rechargeable Battery

You have an almost brand new Ryobi battery that the charger won’t recognize and won’t charge. Here’s how to fix that.

NOTE: Before doing all this, first try to pulse charge your battery by plugging and unplugging your charger (with the battery in it) for 10 seconds. Try this a few times. If it doesn’t correct the problem, continue on with this tutorial.

Instructions

Cut the end off of your AC adapter. That’s right. Just cut it off. It’s for a 10 year old cell phone, you’re never going to use it again anyway. It’s frankly kind of weird that you saved it to begin with.

Remove the screws holding the battery together. There’s a hidden screw under a piece of plastic. You need to pry the plastic off to get at the screw underneath. I used a very thin screwdriver to pry it off.

Remove the 2 plastic side pieces. They’re the things you press in to remove your battery from your drill.

Set the Multimeter to read volts. For testing an 18 volt battery choose the 20 volts setting. This will give you the most accurate reading. (If you don’t have a multimeter skip to Step 9 and hope for the best)

Touching the red probe to the positive (red) terminal and the black probe to the negative (black) terminal, read the voltage shown on the multimeter. In my case the battery was carrying a charge of 0.06 volts. Which is almost nothing, but not completely nothing.

Plug your AC adapter in and using the wires, boost your dead battery. Just touch the black wire to the negative terminal (the one with the black wire going to it) and the white wire (or striped wire) to the positive terminal (the one with the red wire going to it). Do this on and off for approximately a minute. DOUBLE CHECK THAT YOU ARE TOUCHING POSITIVE TO POSITIVE AND NEGATIVE TO NEGATIVE.

Test your the voltage on your battery pack again. It should be higher than it was before boosting. IF IT IS NOT, THEN STOP. YOUR CELL COULD BE DAMAGED AND CONTINUING COULD BE DANGEROUS.

Put the plastic cover back on the battery pack (just the part that goes into the charger) and set your battery on the charger to see if it will take a charge. If you still only get a red flashing light and the battery won’t charge, boost the battery some more. I find the battery charger will recognize that the battery is good again when you boost it to between 10 and 14 volts.

Repeat the pulse boosting and testing the battery until it will finally be recognized by the charger and you get the green light.

Explore all Lawn Mowers

Discover the eco-friendly and low-maintenance way to mow with Greenworks’ push and self-propelled electric lawn mowers. From 24V to 80V, find the perfect battery-powered fit for your lawn and ditch the noise, fumes, and hassle of gas mowers for good.

Compare Best Sellers

60V 25 Cordless Battery Self-Propelled Lawn Mower w/ Two (2) 4.0Ah Batteries Dual-Port Charger

60V 21 Cordless Battery Self-Propelled Lawn Mower w/ Two (2) 4.0Ah Batteries Dual Port Charger

60V 21 Cordless Battery Push Lawn Mower w/ 5.0Ah Battery Charger

Frequently Asked Questions

Does this mulch?

Yes, Greenworks mowers are designed for grass and mulching weeds and foliage—and has a side discharge and a bagging option.

What maintenance is required for my Greenworks mower?

Unlike traditional gas mowers, Greenworks electric mowers require no gas or oil changes, spark plug replacements, or carburetor cleanings. This makes maintenance a breeze, our mowers only need occasional blade sharpening and cleaning (discharge, bag, etc.) to keep them running smoothly.

Can I use these batteries with the string trimmer?

Yes, one battery allows you to mow, blow, cut, trim, cultivate, and so much more! One Greenworks 80V battery works with 75 tools. One Greenworks 60V battery works with 75 tools. One Greenworks 40V battery works with 75 tools. One Greenworks 24V battery works with 125 tools

Will it work in high grass?

Greenworks Intelligent Power™ senses thick, tall, or wet grass and maintains constant high blade speed for the perfect cut.

Does battery temperature matter?

Yes, to keep your lithium batteries in peak condition, store them indoors in a dry, cool place. Check the owner’s manual for storage and temperature instructions and let the batteries warm up to room temperature before using.

The best cordless lawn mowers in 2023

Looking for the best cordless mower? Browse our experts’ pick, from budget to premium models.

A lawn mower may be one of the first purchases we make when getting a garden of our own, but that doesn’t mean finding a good quality one is easy. There are so many models and brands on the market to choose from, including corded electric and petrol, but as their range increases and fall, cordless, battery-powered models are an increasingly popular option.

Light and compact compared with traditional petrol models, cordless mowers are simple to use, easy to manoeuvre around the garden, and have none of the maintenance and servicing needs or costs of petrol lawnmowers. Powered by a rechargeable lithium-ion battery, which charges up quickly and won’t lose power in storage, they’re also quiet and emission free.

To compare these cordless mowers against other types of mower, we’ve reviewed the best lawn mowers, robotic lawn mowers, electric lawn mowers and push mowers, too. And if your lawn needs a bit of attention, our experts have tested a range of the best manual and powered aerators and scarifiers.Keep edges looking neat with our pick of the best strimmers, the best garden shears and the best lawn edging, and if you’re thinking about somewhere to store your new mower, our comprehensive guide to choosing the best garden shed will be helpful.

For your next DIY project, have a look at the best cordless drills.

The best cordless mowers to buy at a glance

Cordless mowers. Buyer’s Guide video

Many thanks to Rosie Yeomans and Sparsholt College for their help in making this video.

Getting the best cordless lawn mower for you means ensuring it has the correct cutting width, range of cutting heights, and weight plus a battery run time that matches the size of your lawn. We’ve tested a range of cordless push mowers, putting them through their paces across a range of grass and terrains, to help you find the right one for your garden.

Each mower has a detailed list of pros and cons for clarity and has been rated according to set up and storage, handling, mowing and value for money. Every mower in our round up below has scored a minimum of four out of five stars, so you can buy with confidence.

In every review we award outstanding products our coveted Best Buy award. To see these and the others we recommend, browse our pick of the best cordless lawn mowers, below.

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Best Buy cordless mowers

Husqvarna Aspire LC34-P4A

Our rating: 4.9 out of 5

• Quiet
• Cuts even long grass with ease
• Battery level visible while mowing
• Small and compact for easy storage
• Part of the POWER FOR ALL cordless range

Part of the new Husqvarna Aspire cordless range, which includes a hedge trimmer, pruner and leaf blower, this 34cm mower is powered by an 18V POWER FOR ALL ALLIANCE battery and charger. These are interchangeable with tools in other leading brands such as Flymo, Gardena and Bosch so if you also invest in tools in these ranges, you’ll only need to buy the bare tool and won’t have different batteries and chargers taking up space in the shed.Great for small gardens the mower comes ready to go, there’s no assembly or handles to attach, and it folds down to a compact size when you’re finished, with a telescopic handle that folds completely flat over the body of the mower. It can then be stood up against a wall or hung up, and even comes with a handy hook. The 30l grass bag also flattens down to take up very little room and can be hung on the mower. The Aspire is light, with a carry handle so that lifting it up steps or into other areas is easy and it has an adjustable handle to suit different height users. It’s comfortable and easy to manoeuvre around the garden and has just four cutting heights to choose from, ranging from 25-65mm and changed easily with a single lever on the body of the mower. It cuts grass quietly and smoothly and has an automatic boost that increases blade speed when you’re mowing in tougher, longer areas that works well. You can hear it kick in when you push the mower into longer grass and unlike other cordless mowers that can cut out, just carries on cutting the grass. While you mow the battery charge level is always clearly visible so you know how much battery you have left and when it needs charging. It comes with a two year warranty and we awarded it a BBC Gardeners’ World Magazine Best Buy in 2023 for ease of use.

Specs: Battery: charge time. 95 mins; run time. 500sqm. Cutting: width. 34cm; height. 25-65mm. Grass box. 30 litre.

Buy the Husqvarna Aspire C34-P4A cordless mower from Husqvarna and Sam Turner

Greenworks GDG24LM33

Our rating: 4.5 out of 5

• Easy to assemble and use
• Comfortable padded handle
• Choice of mulching or collecting clippings
• Interchangeable battery with Greenworks 24V family

Ideal for smaller gardens this sturdy, great value cordless mower is easy to put together, well thought out and simple to use. Thanks to a padded handle it’s comfortable to push, although it did feel a little short for our taller tester, and it’s light and easy to manoeuvre around trees and beds and borders. There are five cutting heights to choose from, adjusted with the simple lift of a lever and it offers the choice of collecting clippings in the 30 litre fabric grass bag or inserting the mulching plug and leaving them on the lawn to break down and feed the grass. It mows well but doesn’t like very long grass, with the battery cutting out occasionally but its long lasting brushless motor offers a a decent run time of 46 minutes and it charges in two hours. Plus, as part of the Greenworks 24V family, both the battery and charger are interchangeable with all the other tools in the range, saving you money if you invest in more in the future. We awarded it a BBC Gardeners’ World Magazine Best Buy for the best budget cordless mower in 2023.

Specs: Battery: charge time. 120 mins; run time. 46mins. Cutting: width. 33cm; height. 25-70mm. Grass box. 30 litre.

Yard Force LMG37A 40v 37cm

Our rating: 4.8 out of 5

• Rear roller
• Double folding handle for easy storage
• Quickest charge time
• Part of the Yardforce GR40 cordless range

This sturdy mower has a 37cm cutting width and useful features including a rear roller for those much desired stripes. Awarded a BBC Gardeners’ World Magazine Best Buy in 2022 for small to medium lawns, clippings are collected in the large 40 litre fabric grass bag. It offers a wide choice of seven cutting heights, from 25-75mm, and is easy to fold away at the end of the day. The 40V battery is quick to charge, taking just 50 minutes and when full it has the capacity to cut a 400m2 lawn.

Specs: Battery: charge time. 50 mins; run time. 400sqm. Cutting: width. 37cm; height. 25-75mm. Grass box. 40 litre.

Buy the Yard Force LMG37A 40V 37cm cordless mower from Yard Force, Amazon and Wickes