Any thoughts? So let me ask you, if my battery is dead, is there no other way to bring it back to life, short of re-building the parts, which I have no knowledge of? I used option #3 to fix my battery’s sleep mode. Again, the battery mail takes charge, but will not work. Then when I plugged the batteries back on their chargers, the light blinks just red on both. It seems like the battery has gone completely dead, and because the charger is dead (no lights) the battery won’t work anymore either. Compatible with all Ryobi 40 Volt lithium-ion tools RY40200 RY40403 RY40204 RY40530 RY40460 RY40180 RY40250 and Ryobi 40 volt lithium battery chargers OP403A OP401A OP406A P137A OP404A ZROP401A OP400A RY40440. I have a brand new battery – never been charged since original purchase at HD on a blower. Whats the model? Replace the FET on the heatsink. Unfortunately, if fix 3 isn’t working for you then you may just have a dead battery. I have both a weed whacker and a new drill. bought new rebuilt charger. Then i took the battery out and put it back in and still nothing. The problem is that the battery is completely dead. If it is a hot day, or you have been using your batteries already and they are quite hot, try throwing them in the fridge, or taking them to a cooler area for a short amount of time before trying to charge them again. Hi! What can be done to fix this?? I called support, they said thats not normal and to try fully charging 3-4 times and it “should” last longer. Hi Sherm thanks for the comment. If they are over 3 years old then it is likely just that they are getting old. If I connect the ground it goes to defective even though the battery has 39 volts. Maybe your blower contacts are not connecting with the battery. I have a 40 v mower with 2 batteries about 4 yrs. This is where you have run the battery down and then left it and not charged it up. Arron, I want to charge my battery using an inverter and small solar panel. 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. battery charger green light stays on with battery in dock. I have a 40 volt blower and use it to blow fluffy snow off my drive. Aaron I have two chargers and three batteries (multiple Ryobi 40 v. When we try charging the Sorry – no way to fix it that I know of. Make sure you don’t get this wrong though otherwise you risk damaging both of the batteries you are connecting up. If I forget and leave them in the charger for a day or two they don’t work anymore. I have removed the hold down screw but need advice on replacing the post (removal mostly). When not under load the battery reads 38 volts once again. I have a 36v 2.6ah Ryobi battery. Note that the bad one will not work in our 40 volt hedge trimmer, but does operate in the 40 volt blower. I have a working battery and charger again. I would highly recommend looking for new batteries (non-genuine are fine.) 64 ratings. It doesn’t stay running. Hi Sharon, Sorry but it does sound more like a charger issue to me. Aaron is the founder of and Essential Home and Garden. In our home, the highest DC supply I could find was 18V. This is the second Ryobi battery recall in 2013. Garage is not heated and I just went out and saw that the charger was red. And yes, I’m guilty of leaving it on the charger way too long. Any thoughts? Thanks for any suggestions, recharged the battery and tried again with no results. If you are interested, you can read more technical details about “priming” batteries here: I’ve just build up my knowledge over the years. Hi Victor, it’s hard to say but it could be a charger issue? Read honest and … I have similar problems with a few 40v batteries I own. Uses Ryobi 40V Battery Models RY4030, RY4040 and RY4050 (NOT Included) Ergonomic Handle Provides a Comfortable and Secure Grip 4.5/5. Put battery in mower and will operate for 10-15 minutes. I tried option 2 (power supply) to the + and – terminals but no current flows. So I tested, ohmed the wiring, switch, and motor of the trimmer with all components testing good. Seems like it is charged but its not getting to the battery out put terminal. 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. Just trying to find a quick fix, so I don’t have to purchase a new or used battery! All Ryobi batteries come with a three-year warranty, so it will be worth checking if yours falls within that category. Ryobi batteries are no different, but thankfully there are ways to make sure whether or not it is past the point of saving. Thank you for your help comments. Does that sound like the battery or the charger? Plug the charger in and use your multi metre as directed, you should get a reading of at least 18v, anything below this signals a faulty charger. A reasonable shown voltage can be a over-discharge battery. When I plug the charger into the wall, the red light comes on. Is the battery getting hot? When it is under load on my leaf blower the battery quickly reads below 10 volts. 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. I have not tried your option 3 yet. Still dead. I put the battery in the weed eater and nothing happened. You may find that your battery is still in sleep mode and if the first two approaches haven’t worked, then maybe this one might. Have you got a multimeter to test the battery voltage? ?This is a lithium ion battery and will have that "fade free" power that other lithium ion batteries offer. took 15-20 min. Otherwise, you might need to contact Ryobi support. I picked it up second hand. It doesn’t mean that your battery is done for it just means that it has been over discharged. My 40v weed whacker does that when using the edger if it gets overtaxed. However when i was outside trimming the yard, the trimmer stopped and then started again. I have the ryobi mower with 2 batteries. my battery is a 2016 battery and it will not charge. When I set them in the charger, they blink with at least 1 light on, sometimes 2……. 4.6 out of 5 stars 467. ?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. Then tried to charge, but it went to flashing red. Problem solved. Using international brand LG batteries cell, the same as OEM batteries. Some are great and work well, others are not worth the time or the money. Removing and then replacing the battery does not cause the charger to wake up. Dirt on the terminals can be removed with a wire brush or an alcohol-soaked wipe. This 6.0 Ah battery gets 3X more runtime than the RYOBI 40V 2.0 Ah Compact Battery, while delivering the same fade-free power and performance. What gives with the lights being illuminated but short run time? Do I need to do this for a longer period of time? Sounds like either the battery or the charger has a fault. Shows all green but will not work. 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. On my mower, the bolt the handle swivels on was loose enough that the switch would vibrate so that the mower thought the handle wasn’t properly positioned for safe operation. One of the common issues that you can encounter when using Ryobi cordless tools is the Ryobi 40v battery not charging problem. This battery is not a replacement for the Ryobi 40v battery (OP40401) that comes with the aforementioned blower, yet it is mentioned in the description (which lists every battery on the Operator's Manual list), including the battery model OP40401. No previous problems. Both chargers have the same “manifestations.” This all started after using my leaf blower with all three batteries, and trying to recharge. I would doubt if it was used more than once or twice. I have a P104 lithium battery that shows full charge on both the charger and on the battery, but will not work when placed in any of my Ryobi tools. I’m going to try your recovery method (they’re Li ion, so the procedure should be the same) but I was Any ideas? As far as I can remember, the last time I used it (about 2 weeks ago), it ended up with 2 bars of power left. Even more insane is that different manufacturers sell identical products, except that they use different proprietary battery designs. I don’t think it’s charging because the “charged” light has not come on and it’s been on for several hours. Once you have reached the allotted charging time, simply plug the battery back in and away you go! I have a 40 volt 5 ah Ryobi battery. I am equally unsure why the battery initially showed 100% with 40 volts across the terminals, but now only has 19 volts and still shows 100%. Thanks a bunch! The most common cause for your Ryobi 40V Charger showing flashing red and green lights is that the battery has been over-discharged. On the top you can get to it to remove but there are several rather large solder connections that you will have to unsolder in order to get remove the board to get to the bottom of it. 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. Which ones? I have two 40v battery/chargers(1 less than 1 year old) both stopped working. Moreover, are Ryobi and Greenworks batteries interchangeable? Thought I had a bad battery #3 did the trick – Thank you!! I have this exact same problem. I jumped from the good battery charging terminals, to the defective battery +- terminals (with a spark!). This is a lithium ion battery and will have that "fade free" power that other lithium ion batteries offer. The light will not come back on unless I unplug the charger for several minutes then plug it back in. The weed eater and blower are only 18 months old and not used much. It really isnt advisable to replace these. Is it charging correctly? Has anyone had this issue? Some people say that you dont need to condition Li-Ion batteries, others say you do. I tried the solution #3, out & in for 30 minutes, but the red & green lights keep flashing. Thanks for the article. Do you have a multimeter to test the battery voltage? 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 ? Thanks for sharing your insight. Then today I cleared the snow again and following the cleanup, I placed that battery in the charger again, and again, it will not take a charge. I have a Royobi 40402 40V blower. 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. New battery on way. When you say fairly new – when was it purchased? Batteries aren’t known to be temperamental, but they actually are. Do you have any other batteries that work in that charger? Batteries lose charge in time, and also replacing them could be costly. When I plug in my Ryobi 40V Lithium Ion battery charger without the battery attached it has a solid red light. Can they be bled down to zero? First thing I would do is clean the terminals on the battery and the charger. No problem! If you are out of warranty, it will still be worth taking your battery in as the store will be able to dispose of it in the correct manner. Hey Aaron, Thanks. Glad it worked for you! I have, however, a different problem. Send me more details if you like: aaron (at) essentialhomeandgarden dot com and I can help you source what you need. The battery has been in the charger since October. When I put battery in charger the flashing red light appears. Good evening. Glad it worked! Replacement generic battery did same thing. The green light starting flashing constantly and continued to fully charge. I left them in the charger several hours just to see if the lights were incorrect but the voltage stayed around 19. I put my 2.6Ah battery in the charger and it flashed green and finally solid green. When you choose to click on a link that takes you to an external site, we may earn a commission from any sales made on that site thereafter. Try using a star bit to tighten up the handle connection. 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. hank you. Stay safe. Then try charging the battery again – this may be enough to kick the battery back into life. Again 15 seconds of charge. I am trying to determine if I have a bad batteries or a bad charger. You can see a video guide on how to do this here. 90-day money back and a 12 months limited warranty! 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. If your terminals are corroded, then the corrosion can be removed with a piece of sand paper. Dear, in France it is called 36V (instead of 40V) but I suppose it is same. How old is it? I have a issue with one of my 40 volt Ryobi Batteries. Simply connect the contacts, positive to positive and negative to negative. Help. Sounds like a faulty charger to me. I then checked voltages of the battery as follows: It took a lot of patience (a good 15 minutes), but worth the time inserting and removing the 40 volt battery. That recall involved Ryobi brand Lithium 18 V 4Ah battery packs, model number P108. This causes the battery to look as though it is dead and lifeless, but that may not be the case at all. These are common symptoms. Any ideas? When I put it back on charge, it took a charge just fine. Is this a bad charger and is there a fix? Sounds very similar to an overheating problem. It can be infuriating, and a lot of people don’t realise that you might actually be able to fix them without having to spend money. When I check the battery gauge, it shows it’s full and flashes. Hi Lynn, I had a similar issue. Glad it worked! It is relatively typical know-how that batteries have to replaced ultimately. The green light on the charger and battery flash for hours without charging the battery. When you put it on the charger the red and green light flashes on the charger. When the charger is empty and first plugged in, it showed flashing red light ( the manual says it should be steady red light). Posted by 2 months ago. Took a while to figure it out but flat I discovered it. I’m also unable to use it. I have a 40v Ryobi battery than when plugged into the charger the charger light stays green but the battery doesn’t charge. Thanks. 3 good, 2 with completely dead cells, and one with good cells and a bad board. Hi Tom, I am not sure sorry. Hello I’ve got a Ryobi 40v battery that has been great up until lately it shows all green on the battery but dead in the leave blower. The weed whacker is older than the drill, the drill is not even a year since I bought it. Initially, it had 40 volts across the terminals, and would not power a trimmer, so I assumed the trimmer was bad and replaced it. I tried to put it in a tool and nothing happens. Or if I had another charger from a different manufacturer with the correct voltage does anyone know what the electrical connections are inside the battery that need to be connected to. same experience. I’m thrilled to say the Ryobi is charging now, and truly thanks to you! 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. Well that indicated it could be the charger? You need to keep your battery in a temperature range of between 5 degrees and 45 degrees. Yes. I have 3 batteries and it takes all three to do my drive and our elderly neighbors too. There are ways to attempt to fix this problem; take a look at the possible fixes below. The charger works fine to charge the other battery and the mower works. Thank you! Sounds like a faulty battery to me. Are you able to check a different charger? You’ll be horrified at the amount of build-up that comes off the terminals! Is it possible the battery is frozen inside, & won’t budge? Any advice? Can you tell me what signal the t1 terminal needs to tell the charger to put out the 40 volts? Alternatively, use the contact form here or ask in our Facebook group. 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. Do i need to make any connectino to the other terminals marked T ? My battery is 4 months old and won’t charge. I called Ryobi and they sent me a new battery. Hey this is Sam Peters. When you connect it to a power source there’s 2-3 seconds of charging before it says “stop, I’m asleep!”. This morning I used it until it quit and tried it again and it quit again so I put it in the charger and got no lights. The indicator lights on the battery show depleted charge, but it isn’t completely dead – I used the weed eater briefly, but it had slowed power. This is one of those topics that has experts divided. You need to work out if it is the charger of the battery that is playing up. On February 26, 2013, over 50,000 Ryobi power tool battery packs were recalled for a similar risk. Thanks. If they are too hot, they don’t work, likewise if they are too cold. 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. To expedite the process please have the battery in question as well as a compatible tool and charger. Hahaha! The model number and date code can be found on the data plate located on the bottom of the charger. My 40v batteries fuel gauge stopped working a week or so ago. Could be a faulty charger if not…. But hey it was still good soldering practice! You could try opening the battery houding (just the plastic bit) up to see if you can see anything – but do be very careful as it can be dangerous. I tried option 3 and it worked. 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. At all. 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? Hi Josh, How old is it? It’s what I’m beginning to think. What can I do? This is new equipment purchased a couple of months ago. I havent tried this. Thank you so much. Battery chargers included in this recall are green and grey and have "Ryobi" printed in white lettering on the front of the charger. What could be the problem ? Check battery fuel gauge, 3 lights illuminate. 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