Hi, Aaron! Why does this work? But when put into the charger the red/green lights flash indicating a defective battery. I put the battery on and off the charge about 20 times. Now my charger just flashes red & green even without a battery attached. Thanks. Have you been able to remove it in the past? If you press the charge indicator on the battery (? In your example, the 4.1V cell would lose about 1Wh of energy while discharging to 3.9V, based on what I’ve read on the internet. I left it in for a couple hours and still nothing. 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. Contacted Ryobi. Do you have another battery to try in the tool? I release the bar, push the start button and it starts up again. Is the battery getting hot? My 40 volt lawnmower is cutting out with a battery level over half. 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. Could that be the issue? I assumed it needed a replacement, so in May this year, I bought a new charger/battery. Or what is the actual “key” do doing step 3? By ower speed ,I mean somewhere between half power and full power. I may end up using some of the tips for a battery I have. Description; Shipping and payments; eBay item number: 333783407872. Does the charger have any sign of life at all? One of these being the narrower range of temperatures that they will operate, and charge in: Li-Ion batteries will generally charge between 32°F to 113°F (0°C to 45°C). The charger works fine to charge the other battery and the mower works. Hi Tom, I am not sure sorry. 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. I have an Ryobi 40 volt string trimmer that is 5 years .code CS1305. Then after a couple of minutes it started working and I was able to get finished. What can I do? What should I do? . When I plug the charger into the wall, the red light comes on. When placed in either of my devices it will not work. The only thing that I can think of is that you have accidentally bumped one of the contacts out of place? Thank you, thank you, thank you. 40V 6.0AH LITHIUM-ION BATTERY. When I took the battery apart and measured on the board from the CL1- soldered connection to the Bat+ terminal connection on the board, I measure 41volts. Not sure if the cold has anything to do with it? I can find a replacement for you if you like. Ryobi defective 40v battery. If the same fault occurs then you have a faulty battery, if the problem does not happen on a different charger then it is likely a faulty battery charger. Best regards. Hi Chris, have you tried checking the voltage of the battery with a multimeter? New 40v battery already defective? So I tried them both in the weed whacker and it didn’t work either. No light nothing. So keep this in mind when carrying out the following recommendations. The best way to test which is the faulty part, is to take your battery down to your local store that sells Ryobi 40V tools and try it on one of their chargers. Do I have a faulty battery?, faulty charger? Maybe your blower contacts are not connecting with the battery. At all. Brand New. Aaron any idea on a Ryobi 40v hedge trimmer when the battery shows fully charged but the trimmer does nothing at all? took 15-20 min. Do you have a multimeter so you can see what the voltage the battery is at? I’ve just build up my knowledge over the years. All opinions are our own we pride ourselves on keeping our articles fair and balanced. View Blog, Waterdrop Reverse Osmosis Water Filtration System WD-G3-W Review, Place the battery in the charger until the green indicator goes solid, Just before the red/green lights start flashing, remove the battery from the charger, Re-insert the battery into the charger again and repeat steps 2-3, Do this until the green light flashes constantly (might take up to 30 minutes). The new charger didn’t work! Chain Saws. Sorry I can’t be more specific but it’s hard to tell without testing a few things. For more info see our disclosure statement. Voltage measured between +ve and -ve terminals :33.9V I opened the ‘bad’ battery and found the two junction points marked BAT+ and BAT- next to the 4 pin connector. I then checked voltages of the battery as follows: Read honest and unbiased product reviews from our users. But that does sound suspiciously like it could be faulty circuitry on the batter control board. I hooked a multimeter to the battery leads and the voltage slowly drops as the battery slowly drains itself. All 4 green lights on the battery and solid green light on charger. what is a good indicator to recycle this current battery and purchase a replacement? I then tried to put it back into the charger and it goes straight to solid green. In my opinion Ryobi 40V cordless tools are some of the best available, although it does seem that the batteries can suffer from numerous problems. Read honest and unbiased product reviews from our users. There are ways to attempt to fix this problem; take a look at the possible fixes below. I don’t get any lights on battery or charger when I plug them in. So I have some good news for you; it is possible to fix most Ryobi 40V battery problems yourself. If the Handel slides off the button the mower cuts out. I’m also at a loss for removing the battery from the trimmer. Free shipping. I had a similar issue. I have a 40 v mower with 2 batteries about 4 yrs. Now the charger flashes red and green as soon as it’s plugged in, without even having a battery mounted on it. Please help me? Some are great and work well, others are not worth the time or the money. Put battery in mower and will operate for 10-15 minutes. The battery has been in the charger since October. First thing I would do is clean the terminals on the battery and the charger. I have a Royobi 40402 40V blower. If you wait about a minute it will start working again. But neither were plugged in at the time. Amazon has the new ones, Otherwise if you are looking to save some money then maybe look for second hand units? Dirt on the terminals can be removed with a wire brush or an alcohol-soaked wipe.