Is there a chance for recovery. Eventually, this results in enough charge for the battery charger to resume normal charging operation. I just finished swapping a good board onto the good cells, but the voltage at the contacts is only slowly creeping up, and when a load is applied it drops right off. The problem here with Ryobi 40V chargers, is that they don’t incorporate a “boost” feature that would allow a a battery that has entered sleep mode to be woken up again. To replace a battery that is still under warranty, please contact our customer service at 877-655-5250. First thing I would do is clean the terminals on the battery and the charger. Did you try the any of the methods listed in the article? Essential Home and Garden provides trustworthy reviews, guides and tips for anything and everything to do with the home and garden. You were right. Dirt on the terminals can be removed with a wire brush or an alcohol-soaked wipe. When you buy through links on our site, we may earn an affiliate commission. Same here and it’s a relatively new battery. I’ve been given a Ryobi trimmer with a #OP4026 battery. thanks! I’m just trying to get the power supply in the charger to turn on. 4.4 out of 5 stars 49. Hi, Aaron! This is a sign that your batteries are on the way out. why would battery charger light stay green if battery is defective (only charges to 18 v)? old one battery works fine the other stops with 1/2 charge showing on the indicator can it be fixed or should i replace it ? Garage is not heated and I just went out and saw that the charger was red. Ok, have a ryobi hedge trimmer, 40v. Press the button on the battery and hold it in, then pull on the battery and in the opposite direction, pull on the tool. then it shuts down again. My battery is 4 months old and won’t charge. 40v. It works fine. I have not tried your option 3 yet. My 40v weed whacker does that when using the edger if it gets overtaxed. Stay safe. Thank you for your help comments. I really need to get this battery going, again! Hi Bridgitt, that could be a faulty charger or battery. Ryobi claims that one of these batteries can last longer than 6,000 AA batteries. I’ve got the blinking red green issue. Thats great news! It might be the tool. The green light starting flashing constantly and continued to fully charge. 3 good, 2 with completely dead cells, and one with good cells and a bad board. I did use it a few times to blow off my driveway to remove cinders and rock salt from the state trucks when they plow and cinder. I have a issue with one of my 40 volt Ryobi Batteries. Not really enough info there to help out. I put my 2.6Ah battery in the charger and it flashed green and finally solid green. The battery has been in the charger since October. Either way, it can’t hurt to try it as they suggested – worst case you take it back and exchange it for a new one. If they are over 3 years old then it is likely just that they are getting old. Praise the Lord! When I place it in the charger there are still 3 solid green lights with the 4th flashing green which goes continuous green eventually, so you have 4 solid green lights, then it goes through the sequence again as described above. what is a good indicator to recycle this current battery and purchase a replacement? My 40 volt lawnmower is cutting out with a battery level over half. battery reads 18v dc across terminals. Or what is the actual “key” do doing step 3? If the metal contacts on the battery or charger become dirty or corroded, then it can cause the Ryobi charger to incorrectly assume that the battery is faulty. Could that be the issue? CDN$ 6.00 coupon applied at checkout Save CDN$ 6.00 with coupon. The battery works to start the mower but once you turn the mower off, if you go to restart the mower you have to pull the battery out and reinstall it for it to work? Should I keep trying to slide it in & out of the charger until the charger recoginizes the battery? The problem is that the battery is completely dead. Has it got dirty terminals perhaps? It shows as fully charged but when it’s used in only runs the tools for a few minutes and then quits. If you have access to a Pace solder station or something similar you can get the board removed but otherwise…..? To expedite the process please have the battery in question as well as a compatible tool and charger. Have a trimmer. One of the most common issues with the Ryobi batteries is the sleep mode. Have you got a multimeter to test the battery voltage? If this is the case, simply bring the battery inside and let it sit so it can balance at the ambient temperature of your room. bought new rebuilt charger. I have both a weed whacker and a new drill. Do I just leave the battery in the charger all the time? I learned to unplug the charger on hot days when I was using the battery after that the tool ran fine. If you need your replacement Ryobi 40V battery parts in a hurry, then you will want to head straight down to the closest supplier and buy it locally. Any suggestions? What could be the problem ? I’m so stoked! Sounds like a battery that has just gotten old and tired. Put in charger all lights on battery come on, one flashing, and charger green light flashes for a minute then goes solid green—full charge. They all flash at the same time four times. All four lights illuminate after charging. Some of you will have access to a multi meter, these devices measure current that is passed through equipment. Now my charger just flashes red & green even without a battery attached. battery charger green light stays on with battery in dock. Check that the contacts on your charger and battery are clean and look to be where they are meant to be. Well each time you insert the battery into the charger, it gives it a small amount of charge before detecting the battery as sleeping. If you want to ask my advice directly, feel free to send me an email at aaron (at) or leave a comment below and I will do what I can to help. If I connect the ground it goes to defective even though the battery has 39 volts. It went through a complete charge and now I know not to let the battery completely drain. I did contact Ryobi – as well as a local Ryobi dealer; local dealer said I had a dead battery. ?This is a lithium ion battery and will have that "fade free" power that other lithium ion batteries offer.Ryobi also states that their 4V battery will last for around 2,000 full charges before becoming defective. Backed by a 3-year warranty, there's never been a better time to consider cordless. Moreover, are Ryobi and Greenworks batteries interchangeable? Hahaha! I purchased the generic battery and the mower will run fine for about 30 seconds and then it shuts off. Required about 4-5 minutes of in-and-out but then the green stayed solid and battery is charging. A problem occurs when you use it till its empty of charge, then let it sit for some months. I have arthritis in my hands and it is very difficult if not impossible to remove the battery from trimmer. I have a 40 v mower with 2 batteries about 4 yrs. Hey Alan, unfortunately if you don’t feel like replacing the individual cells and/or the circuit board in the battery then there is no magical way to revive them – apart from those I mentioned in the article. When I check the battery gauge, it shows it’s full and flashes. You should be able to let your battery completely drain if it is used regularly. My batteries are over 6 years old and although they show fully charged, they run out very quickly. I have the ryobi mower with 2 batteries. For more info see our disclosure statement. ?This is a lithium ion battery and will have that "fade free" power that other lithium ion batteries offer.Ryobi also states that their 4V battery will last for around 2,000 full charges before becoming defective. I think the best bet is to take the charger and battery into your local tool shop and get them to give it a quick check. Maybe your blower contacts are not connecting with the battery. It is relatively typical know-how that batteries have to replaced ultimately. No previous problems. Have you tried the suggestions in the article? Overtime these can become dirty and clogged. What can be done to fix this?? Thanks, again! Hi Tom, I am not sure sorry. This is one of the most common causes of so-called ‘defective’ Ryobi battery cases. Is there any sign of life from the trimmer at all? Any ideas appreciated. 3. If the battery is only 10 months old it might be worth calling Ryobi support – it might be covered under warranty. Ryobi 40-Volt Lithium-Ion 6 Ah High Capacity Battery OP40601 4.8 out of 5 stars 59. Sometimes, no matter how much we try, we just can’t bring our old batteries back to life. Just trying to find a quick fix, so I don’t have to purchase a new or used battery! Whats the model? Hi Sharon, Sorry but it does sound more like a charger issue to me. Does that sound like the battery or the charger? Hi Chris, have you tried checking the voltage of the battery with a multimeter? Previously, are used it in the weedeater and the weedeater got hot. It has been sitting in my garage for several months, so the idea of “sleeping” makes since but it does not seem to take the charge from the other battery. Leave it on charge, but it ’ s showing 19 volts more or less a. Battery level over half minute and cuts off when I went to charge my battery ’ good. The button and it “ should ” last longer in sleep mode a! 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