On the right side (looking as if you are pushing the mower) at the handle/mower connection, there is a small switch that must be activated to tell the mower the handle is fully set in the “use” position, not the “fold for storage” position. Seems like a memory issue. When I press the button on the battery all green lights work but go out when button released So repeating this process over and over results in the battery slowly being charged in very small increments each time. . It shows as fully charged but when it’s used in only runs the tools for a few minutes and then quits. This is commonly known as the battery being in “sleep mode” Should I keep trying to slide it in & out of the charger until the charger recoginizes the battery? Not sure why it would display 100% charge, and have 40 volts on the terminals, but still not power anything. But what do you do when the battery stops playing ball? When I plug the charger into the wall, the red light comes on. Some people say that you dont need to condition Li-Ion batteries, others say you do. They seem to be ok if I take the batteries out right after they are fully charged. This question was also asked in our facebook group, but I will post the answer here as well for others to benefit: Hi Matthew, it sounds to me like a faulty battery. Finally the green charging light stayed on and battery is charging. Because the severity of arthritis can differ so much from person to person, I would recommend going to your local hardware store and having a look at what they have there. Any ideas? Hi, The terminals may be covered on your battery – but I would not recommend that fix unless you have some knowledge in electronics and batteries. They all flash at the same time four times. When my first battery failed, I called the Canadian Ryobi support line (sorry, don’t seem to have kept the #); they sent me an OP40501 (grey/black) as a replacement for my original OP4026 (lime green) battery. Arron, Thought I had a bad battery #3 did the trick – Thank you!! What this means is the battery has been discharged to such a low level that the charger has trouble detecting if the battery is healthy or not and decides to not risk charging it – showing the dreaded flashing red and green lights. Thanks for your help! I want to charge my battery using an inverter and small solar panel. This time the flashing red light quickly turned into flashing green light for a couple of seconds than came the alternating red and green light. Have you got a multimeter to test the battery voltage? I called Ryobi and they sent me a new battery. The battery was dead when I got it so I put it on charge. Hi, Aaron! Essential Home and Garden provides trustworthy reviews, guides and tips for anything and everything to do with the home and garden. Look at the positive side though, you will now have two batteries to use! How old is it? You don’t just throw batteries into the bin; this needs to be done the right way. Then i took the battery out and put it back in and still nothing. This causes the battery to look as though it is dead and lifeless, but that may not be the case at all. Disclosure: As an Amazon Associate I earn from qualifying purchases. The charger works fine to charge the other battery and the mower works. Unfortunately you probably need to get a new battery. If you want to let me know the model number of your tools/battery I can look up a replacement for you. Even more insane is that different manufacturers sell identical products, except that they use different proprietary battery designs. Try using a star bit to tighten up the handle connection. I was told my existing battery is still under warranty – I will pursue a replacement as well. The air temp is 18 degrees today, so I did not do the warm up thing again, but maybe tomorrow. Ryobi also states that their 4V battery will last for around 2,000 full charges before becoming defective. Should I take it back to the Home Depot where I got it and get a replacement battery or charger? Can that be fixed. When I plug a battery into the charger, the charger flashes green 6 times, then red, green, red, then the light goes out. 4.6 out of 5 stars 198. Are the terminals dirty? I tried all options but none worked. Some of you will have access to a multi meter, these devices measure current that is passed through equipment. thanks! Then tried to charge, but it went to flashing red. I purchased the generic battery and the mower will run fine for about 30 seconds and then it shuts off. Then I re-plugged it in and the SOLID RED light came on and stayed. So I have some good news for you; it is possible to fix most Ryobi 40V battery problems yourself. It certainly can! I have the same symptoms with a battery someone gave me. Should the batteries be taken out of the charger right after they reach full charge or should I be able to leave them in the charger indefinitely hence a bad charger. Ryobi batteries are no different, these lithium-ion batteries are known to have their issues, but issues don’t mean that it can’t be solved. Will comment on the end result. I would doubt if it was used more than once or twice. It’s showing 19 volts more or less with a volt meter. Replacement generic battery did same thing. If I forget and leave them in the charger for a day or two they don’t work anymore. New 40v battery already defective? How old is it? My batteries are over 6 years old and although they show fully charged, they run out very quickly. Do you have a multimeter to test the battery voltage? Having cordless tools sometimes means you are faced with the unenviable situation of potential battery failure. run time is maybe 10 minutes then I can re charge. Previously, are used it in the weedeater and the weedeater got hot. It charged all the way up before giving me the red/green flashing lights. Once you have confirmed that your charger is ok, move onto the battery. I’ve tried storing the battery away from the drill, and truedleaving it in the drill. Instead of throwing it out the first thing you need to do is give is micro charges, all you’re going to do is plug the battery into its slot for a few second and then take it out. If you aren’t in too much of a rush and are looking to save some cash, then consider purchasing from a reputable online store such as Amazon. Thanks, again! Would appreciate any suggestions on how to fix. It doesnt make sense to me as to why it would make a.difference but I’ll try. Is this a symptom of old batteries? All RYOBI 40V tools are covered by a 5-year limited warranty. Has anyone had this issue? This year I have one battery that won’t work in the mower despite showing its fully charged by the tester. They should have new chargers in stock to test your battery on to work out which is at fault. Upon further inspection what I’ve discovered is that the plastic fins near the terminals of the battery have been warped, as if the battery overheated while in use. I have a 36v 2.6ah Ryobi battery. Still doesn’t make sense logically – but am going with their recommendation to replace battery. In our home, the highest DC supply I could find was 18V. Overtime these can become dirty and clogged. I cannot remove the battery from the hedger to charge. Unfortunately, if fix 3 isn’t working for you then you may just have a dead battery. Yes I did get the situation resolved. The third, flashes on the very first light. All four lights illuminate after charging. Unfortunately, if none of these solutions solve your Ryobi 40V battery problems then it is likely you have one of two problems: Either your battery is faulty, or your charger is faulty. I think it is easy to modify inside charger (a resistance value or something else), to reduce output power. I have it plugged in to (re)charge, the “charging” light is pulsing. Here are the most common issues faced by Ryobi owners and 5 ways to fix them before you have to hand over your hard-earned cash. Hi Aaron, I have a Ryobi cordless drill, I don’t use it often and it won’t charge it just continues to flash red? When I test the battery in the trimmer it works for 2 to 5 seconds and then dies??? Amazon has it here. Glad it worked for you! However when i was outside trimming the yard, the trimmer stopped and then started again. I have two Ryobi 40 volt Lith to run a chainsaw, 1 battery shows fully charged both on the charger and on the lights on the battery but will not even try to run the saw, the second battery shows defective on the charger ( red & green Lights flashing) with only one light on on the battery but runs the saw just fine. I just ordered a new battery online, I’m hoping it wasn’t the charger. bought new rebuilt charger. You should be able to let your battery completely drain if it is used regularly. 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. 4.4 out of 5 stars 49. And they didn’t want the old one back. Does the battery go flat when the mower cuts out? These temperature fluctuations can damage the way the battery holds energy. Ended up Just using those batteries in other tools, What if the battery or the charger got wet. As with any DIY fix with cordless tool batteries – it does have some dangers involved. If the battery is bad, it is supposed to continue flashing red/green (not turn off completely from my understanding. This is the second Ryobi battery recall in 2013. This is where you have run the battery down and then left it and not charged it up. My OP400 charger repeatedly stops charging after about 15 minutes and all lights go dark. I put it in the charger, all I get is the red power on light. then it shuts down again. Hi Sharon, Sorry but it does sound more like a charger issue to me. Is it charging correctly? And yes, I’m guilty of leaving it on the charger way too long. It works fine. I tried option 3 and it worked. Plugged the battery on charger and the light on the charger shown sold green. This recall involves Ryobi model P113 dual chemistry battery chargers designed for use with both NiCd and Li-Ion portable power tool batteries. ?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. Did you try the methods of waking a sleeping battery? 40v ryobi trimmer: Depressing trigger does not cause trimmer head to turn and no sound. Again, the battery mail takes charge, but will not work. Hi Sherm thanks for the comment. I release the bar, push the start button and it starts up again. The light will not come back on unless I unplug the charger for several minutes then plug it back in. What gives with the lights being illuminated but short run time? So, I have two good batteries and know how to resuscitate them. The lawnmower and the 2 batteries it came with. When I go to use it it runs around high speed for a few seconds and then completely stops. Powered up whenever I turn the power bar on with all my other chargers. I put my 2.6Ah battery in the charger and it flashed green and finally solid green. Ryobi claims that one of these batteries can last longer than 6,000 AA batteries. If I release the trigger, and tap the outlet or remove and replace the battery it will start but only runs for 30 seconds or so. I haven’t used my trimmer since August. 4 years is pretty good out of a battery these days! Any advice? Does the charger have any sign of life at all? I currently have a Ryobi Trimmer Model P117 18 volt which is approximately 6 years old. Thank you so much. Thanks. I’ve just encountered the Red/green light flashing for my 36V 5Ah battery and am balking at the fact Thanks! I left it unplugged for a few days and it’s still flashing red & green. When I plug in my Ryobi 40V Lithium Ion battery charger without the battery attached it has a solid red light. Replace the FET on the heatsink. Still showing full charge. Free shipping. I have a issue with one of my 40 volt Ryobi Batteries. It went through a complete charge and now I know not to let the battery completely drain. 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 would highly recommend looking for new batteries (non-genuine are fine.) Can the cells be replaced, making it new again, if this continues to happen? Has it got dirty terminals perhaps? Good evening. I have similar problems with a few 40v batteries I own. I have an Ryobi 40 volt string trimmer that is 5 years .code CS1305. Ryobi 40V battery (96 Wh), 3 years old, will charge. But if it is only a year old I would go for a warranty repair/replacement. I have 2 40 volt ryobi batteries with a similar problem. Wondering what it could be? After I put the battery in, it was still flashing red lihgt and not charging. It’s only about 3 years old. When I put battery in charger the flashing red light appears. wondering if you know if the 36V tools will support a 40V battery. recharged the battery and tried again with no results. Whether you have a Ryobi cordless mower, a pole saw or one of the many other tools available, a common problem with Ryobi batteries is when the charger shows green and red flashing lights. Hence, I tried your Option 3, pushing the battery into the charger for five green flashes, out, five green flashes, out, and so on. Patience is required here – so read these instructions carefully and find somewhere comfortable to sit! Thanks. my battery is a 2016 battery and it will not charge. My 40volt battery won’t charge. I get to 4 green lights and if I use it it will just stop and when I put it back on the charger it show 3 green lights and charges up to the 4 green light and works for awhile. Shows all green but will not work. Just bought a Ryobi 40v cordless hedger. Get it by Tuesday, Dec 29. Thanks for the article. If it doesn’t appear to be charing, then I would take both the charger and battery to Home Depot to get them to check it. Thats great news! Only one green light on battery. You said if solution #3 wouldn’t work for me, I might have a dead battery, which I assumed I did in the first place. I am trying to determine if I have a bad batteries or a bad charger. For replacement of 4V, 18V, 24V, and 40V batteries that are not under warranty, please visit The Home Depot. Did you try the any of the methods listed in the article? Remember polarity of batteries as lithium ion will blow up if reverse charged. BTW this problem was not present last season it started this year. I habe a 40v ryobi battery than when plugged into the charger the charger light stays green but the battery doesn’t charge nor work in any tool. Is there anything I can do to get it to work or is the battery beyond repair? The weed whacker is older than the drill, the drill is not even a year since I bought it. Which ones? YOUR WEBSITE JUST SAVED MY BUTT!!! Or even a faulty battery. Not sure if the cold has anything to do with it? Assuming your mower is like mine, check the bolts that hold the handle to the mower. Replacement for Ryobi 40 Volt Lithium Battery/Ryobi 40 Volt Battery OP4050A, Rechargeable Lithium Battery Type, 40V Voltage, 6000 mAh Capacity: Ideal for Ryobi 40V Blowers, Mowers, Weed Eater, Trimmer, and Chain Saws, etc. It could be that you forgot and left it on the shelf in your shed. Thinking the circuit board must be bad, but interested in your thoughts. I would guess its likely the battery though. (and my Ryobi dealer (Home depot) is not local so I can’t visit to try and figure out battery vs. I picked up one of these units. I have the same problem Victor. Just trying to find a quick fix, so I don’t have to purchase a new or used battery! The reason I ask is because I discovered the bag, when full, jumped out of the connection slot every time I turned the mower around. Dirt on the terminals can be removed with a wire brush or an alcohol-soaked wipe. That way you can be sure to get one that you can actually use! Took a while to figure it out but flat I discovered it. I attached It to the trimmer and It did not work obviously because It is not charged. I have the ryobi mower with 2 batteries. Sounds like a tricky one. The new battery works fine in either tool. I pressed the button on the battery to see if It was fully charged and nothing lit up. All 4 green lights on the battery and solid green light on charger. If the micro charging approach didn’t work, you may well need to get slightly more technical. after trying #3 I still have a battery the charger indicates is ready for use, only to get a second of power from the tool you sent. About a month ago I jumped into the 40v pool with the brushless expand-it trimmer. No previous problems. Excellent article. Sand paper access ryobi 40v battery defective replacement part schematics 230VAC for Fast or Slow speed ( on! Fix that reallyworks function at all the charged last 10-15 min Amazon s... Hold down screw but need advice on replacing the post ( removal mostly ) wiring. 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