I have a Ryobi Plus 1 18V Lithium battery that won't charge. I have seen articles on the internet that they cycle the charger on and off until the battery starts charging. They all seem to have NiCad batteries and I have Lithium and I'm wondering if that is a problem. Anybody have any experience with this?? Thanks in advance for any help. EGBinOR
- Thread starter egbinor
- Start date
Randy Shoe
Member
I haven't had very good luck with my Ryobi batteries either. The last two pack I bought didn't last but 6 to 8 months, and then won't take a charge or hold one over 2 minutes in use. Thought it might be the charger so bought a new one and that's not the problem either.
Those batteries if you run them down too far will not come back.
Chances are if the battery is below around 3 volts per cell the charger won't like it and refuse to charge it. I mess with lithium polymer batteries in radio control. They charge the same as what is called lithium ion. The case seems to be the difference between them
I ran one of my batteries below 3V per cell and I gently charged it back to around 3V per cell with an adjustable power supply. It's been a while and if I remember right the battery started to puff. That's not good and I put it in safe place. It went down and I was able to charge it.
If you were to try this make sure the battery doesn't heat up. If it does put where it can't hurt anything. If they split open the fire is nasty. Even if it doesn't you might want to keep it safe for a while because it is harder to tell with the hard cases.
If you would try this it is at your own risk. These are good batteries when treated right and really bad if abused.
I am a trouble shooter as much as possible.
RT (definitely my two cents worth.)
Chances are if the battery is below around 3 volts per cell the charger won't like it and refuse to charge it. I mess with lithium polymer batteries in radio control. They charge the same as what is called lithium ion. The case seems to be the difference between them
I ran one of my batteries below 3V per cell and I gently charged it back to around 3V per cell with an adjustable power supply. It's been a while and if I remember right the battery started to puff. That's not good and I put it in safe place. It went down and I was able to charge it.
If you were to try this make sure the battery doesn't heat up. If it does put where it can't hurt anything. If they split open the fire is nasty. Even if it doesn't you might want to keep it safe for a while because it is harder to tell with the hard cases.
If you would try this it is at your own risk. These are good batteries when treated right and really bad if abused.
I am a trouble shooter as much as possible.
RT (definitely my two cents worth.)
guido
Well-known Member
Hello EGB in OG,
You did not say what is the pack's voltage? Your smart charger needs to see voltage before it starts charging. If cell voltage dropped below 2.7V the pack will read zero. You can parallel another pack with voltage to make the charger start charging.
You can try charging the pack at low amps, more like 1/4 amp, and then it may take a charge,
Guido.
You did not say what is the pack's voltage? Your smart charger needs to see voltage before it starts charging. If cell voltage dropped below 2.7V the pack will read zero. You can parallel another pack with voltage to make the charger start charging.
You can try charging the pack at low amps, more like 1/4 amp, and then it may take a charge,
Guido.
Geo-TH,In
Well-known Member
I bought two dewalt 18v lithium-ions. One died, wouldn't take a charge. I took it apart and there is like a micro-processor inside battery. The smoke left the micro processor, toast, burnt. I have no clue how much charge is in my other lithium battery. I use it until the tool stops working. Never seems to hurt it running it down. I do have a special dewalt charger designed for the lithium battery. They don't like sub zero temps. They hold a small chager compaired to the Ni-mh batteries. Now dewalt has even a smaller lithium ion, light weight, and it holds even less of a charge.
Quido, Thanks for responding. Reading from the terminals -&+ I get 9.47 volts. when I push the "test" button the light doesn't come on & the drill doesn't move. There are a total of 5 contacts on the battery and I don't know what any of them are for. My original post was inquiring if it was safe to "cycle" the battery. ( plug and unplug the battery to the charger continually, thinking the surges would get it going ) On the you tube presentation it worked but they were NiCad batterys instead of my Lithiums. I've read how "dangerous" these things are so I'm a little hesitant. Nowadays big brothers got his nose in everyting and you don't know if there is real problem or it's the usual overreaction to just about everything. I'll try to post a picture of my battery. Thanks EGBinOR
Goose
Well-known Member
I have a bunch of Ryobi 18v. Plus 1 tools and a half dozen good NiCad batteries. On an auction a couple of months ago, I bought a box, for $15, that contained a cordless drill, a reciprocating saw, a small skill saw, two chargers and one lithium battery.
One charger is older NiCad only, and the other is labeled for either NiCad or lithium. I can't get the lithium battery to charge, so that's probably why the whole works was on the auction. All I wanted out of the box was the recip saw and one charger. In this line of Ryobi, I now have three cordless drills, two skill saws, a flashlight, a hand vacuum, and the recip saw.
I now have tools strung between two buildings, and I had only one charger, so the extra charger was what I really wanted, but when I recently removed an old fiberglass shower stall, the recip saw gave me my $15 back.
I might play with that lithium battery some more before I give up on it.
One charger is older NiCad only, and the other is labeled for either NiCad or lithium. I can't get the lithium battery to charge, so that's probably why the whole works was on the auction. All I wanted out of the box was the recip saw and one charger. In this line of Ryobi, I now have three cordless drills, two skill saws, a flashlight, a hand vacuum, and the recip saw.
I now have tools strung between two buildings, and I had only one charger, so the extra charger was what I really wanted, but when I recently removed an old fiberglass shower stall, the recip saw gave me my $15 back.
I might play with that lithium battery some more before I give up on it.
guido
Well-known Member
Hello EGBinOR,
The two outer terminals are the pack voltage check point. The other three leads are for the charger function.
Take the cover off the pack and check the individual cell voltage. They should read all the same. The circuit in the pack equalized the voltage in all the cells. You probably have 5 cells in series, some bad cells is my guess. Again if you can fool the charger with another parallel source, it may start charging the pack for you. Another way is to use a manual battery charger at the lowest setting and monitor the voltage. Once the voltage is at least 2.7 volts times the # of cells, the charger that you have now should start charging the pack. Let me now it this works or you need more help,
Guido.
The two outer terminals are the pack voltage check point. The other three leads are for the charger function.
Take the cover off the pack and check the individual cell voltage. They should read all the same. The circuit in the pack equalized the voltage in all the cells. You probably have 5 cells in series, some bad cells is my guess. Again if you can fool the charger with another parallel source, it may start charging the pack for you. Another way is to use a manual battery charger at the lowest setting and monitor the voltage. Once the voltage is at least 2.7 volts times the # of cells, the charger that you have now should start charging the pack. Let me now it this works or you need more help,
Guido.
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