I’ve done 16 of these batteries. I agree that the Samsung 25R is the best way to go. The end result is better than 100%. It’s 166% of a new Ryobi battery. (About 46 Watthours instead of 27Wh) Don’t be tempted to use higher capacity cells (mAh) unless they are specifically designed for high current applications. For example : a 3200mAh cell seems great until you discover its max current delivery is only 5 Amps. Find cells that can deliver 20Amps continuously!
Thanks for watching! Yes, getting batteries rated for high discharge is essential! From not only performance but also safety. Thanks for sharing your thoughts.
I recommend to work on cells that are are discharged as a safety precaution. An unplanned short-circuit of a fully charged 4.2 V cell is much more spicy than the one that was discharged to 3.0 - 3.5 V.
Hello friend, congratulations on the video, I think you are a very knowledgeable person. I have a 1.5 amp Ryobi battery. I already changed the new cells and reset the card but it still gives meñ The LEDs do not stop flashing when you press the battery button and the charger does not recognize the battery, it indicates an error and on the terminals that make contact with the drill there is no power but the package
Great project and i'm all about being green and re-using. But just a head's up- right now is Ryobi Days and you can get 4 4ah batteries for $100. $25 each. I believe the newer batteries all have Chinese cells now but I've also heard they are still of decent quality.
@@pfeerick I wonder if there's some variation. I just did mine this afternoon and the 5 on the outer case were T10 and the two that hold the halves of the cell pack together were T8. FWIW the manufacture year is 2017 and the original cells were LG (marked LGDAHB21865)
@@GeoffSteeleAU That sounds pretty much the same as mine. I was only responding to the question of the "two screws inside the battery holder". Outer screws were all T10. Date on my pack was 2014. Not sure offhand what brand the cells were.
That’s funny, I’ve just decided a few hours ago I was going to fix a battery of mine which is the exact same battery. Must be a common thing with the 1.5ah batts, because the 4ah batt of the same age is still good. They’re about 12 years old. I just ordered Sony xtc-6 cells for 10 bucks each.
I'd like to know how you repaired the leads attaching them back to the batteries once in place. Why did you not show that part? They were spot welded before. Did you just solder them back on?
Since no one replied yet I will. What he used, and really the only way, is a spot welder. You can find them inexpensive around 50 bucks and then you have to cut and bend the strips out of a roll. I tried to reuse mine but the metal is too thick for my hobby level spot welder. I did try to solder before getting this tool but it just doesn't work. The amount of heat needed feels.....unsafe lol. This is so much easier to do and once I had the tool I find myself repairing all types of battery powered things. Even making my own packs for things
Hi there, I had a look at the datasheet, looks like the Panasonic CGR18650CG can only discharge at about 4A, which is not high enough for power tools. I highly recommend using 18650 batteries with atleast 15A discharge rate.
Hi there, thanks for watching! The main difference I would expect is that the charge time would be doubled if you go from 1P to 2P. The BMS should still balance the voltages all the same. Output wise, it would cutoff once the pack voltage gets too low (not sure what the cutoff voltage is). Were you hoping to increase the runtime of the battery pack by adding extra set of cells in parallel? That should work, but you'll need an enclosure that fits the extra cells. If you do have say a 4Ah enclosure but a BMS from a 1.5Ah pack, it should be fine to use the 1.5Ah BMS for a 2P configuration to be housed in the 4Ah enclosure. Hope that helps!
I don’t think they’d fit. If you did find a way to fit them, the other thing to check would be if the 21700s are lithium ion or LiFePO4 as different chemistries have different nominal voltages. The Ryobi ONE+ BMS is designed for lithium ion cells.
I have replaced all the cells (10 of them) and it is charging as it should and i get all 4Ah out of it, but if i don't use it, it will discharge itself after two weeks. Does anyone know what could be wrong with my Ryobi battery? If i use a thermal camera i can see a double diode get warm and one resistor and i believe this is discharging the battery, but why? Any tips?
Can you not just add the new cells in parallel ?? I am planning to just add the extra cells to the existing cells in parallel. Can't find a video, is it possible ?? I would be keeping the same BMS.
Unless the original battery pack was still in excellent condition, I would not recommend it, as the new batteries will be doing all the work, and will deteriorate a lot more rapidly than if you replaced the worn out / faulty cells. You clearly won't be able to reassemble the battery pack anyway, and the BMS board may not work as well as a 4Ah one, which is somewhat what the pack would become. i.e. it may have higher rated or more output mosfets paralleled.
Thanks for watching! In this case, Samsung INR18650-15M. But the table in this reddit post might be helpful for your particular 18V battery Ah rating/year and place of manufacture: www.reddit.com/r/ryobi/comments/oxn53g/psa_ryobi_is_using_chinese_18650_cells_in_most_of/
Does anyone else see a pattern with which cells fail in these batteries? I see certain cells in a particular position failing. The cells in my batteries are Samsung, which are considered good cells, by many.
Interesting, I didn't take note of this before. Perhaps those cells go out of balance over time, which happens across many cycles but could also happen early if the BMS is faulty.
@@test-193 someone over on another forum said that Ryobi's design with their BMS had it burning out/failing much sooner than other big tool companies. They seemed to be saying that the BMS fails before the batteries ever run out in a lot of cases. Have you seen this?
You can find Ryobi ONE+ compatible BMS board on ebay or aliexpress and they will get the job done but are not original. If the cells are faulty and BMS is working in a Ryobi battery pack, you can use that.
I eish u spoke slower and do a closer view and keep your fingers out of the way so i can copy down the details of the batteries u showed. Thanks 4 video I'm a Novice to doing this.
@rogerwilco5187 the original batteries were all, black! The tool bodies were originally black and blue "before" they changed to the green color they are now. I have several tools of that era.
@@charlesr.beasley6222 Oh, I misunderstood. I thought that you meant the cells that were already in there weren't the originals, but you were referring to his remark about it being an old battery. It didn't occur to me that you'd be referring to what are long obsolete batteries when the video is obviously about the ONE+ batteries.
Depending on the age of the battery pack, you will find different cells within. But as long as it uses 18650 batteries inside, you can follow my method.
![RYOBI 18V Battery Not Working? [Easy DIY Charging Hack]](http://i.ytimg.com/vi/sqeiOkSNRsU/mqdefault.jpg)
![RYOBI 18V Battery Not Working? [Easy DIY Charging Hack]](/img/tr.png)
I’ve done 16 of these batteries. I agree that the Samsung 25R is the best way to go. The end result is better than 100%. It’s 166% of a new Ryobi battery. (About 46 Watthours instead of 27Wh)
Don’t be tempted to use higher capacity cells (mAh) unless they are specifically designed for high current applications.
For example : a 3200mAh cell seems great until you discover its max current delivery is only 5 Amps. Find cells that can deliver 20Amps continuously!
Thanks for watching! Yes, getting batteries rated for high discharge is essential! From not only performance but also safety. Thanks for sharing your thoughts.
What cells are originally in this battery before upgrading them?
What size and kind of torx screw did you use? I can't find the right torx for it. I'm referring to the screws inside the battery holder
I just went with Sony xtc6. 3Ah, 30A discharge
Simple, short and straight to the point. Thanks for sharing. Hope to see more! :)
Thanks for watching!
Thx. As a novice this helped me determine my pack wasn't worth fixing.
Thanks for watching. Yeah, it's a matter of finding suitable 18650s at a good price.
I recommend to work on cells that are are discharged as a safety precaution. An unplanned short-circuit of a fully charged 4.2 V cell is much more spicy than the one that was discharged to 3.0 - 3.5 V.
finally!!! found one! thank you for this!
Thanks for watching!
Hello friend, congratulations on the video, I think you are a very knowledgeable person. I have a 1.5 amp Ryobi battery. I already changed the new cells and reset the card but it still gives meñ The LEDs do not stop flashing when you press the battery button and the charger does not recognize the battery, it indicates an error and on the terminals that make contact with the drill there is no power but the package
Great project and i'm all about being green and re-using. But just a head's up- right now is Ryobi Days and you can get 4 4ah batteries for $100. $25 each. I believe the newer batteries all have Chinese cells now but I've also heard they are still of decent quality.
Thanks for watching, sounds like a good deal for $25 per 4Ah battery. Are these original Ryobi batteries?
Was that USD?
SparkyLabz gettin er done!!!!!!!
I might be doing the very same soon. I'll be sure to link this video when I do.
All the best and thanks for watching!
Simple explanation thank you...
Glad it was helpful! Thanks for watching :)
What size and kind of torx screw did you use? I can't find the right torx for it. I'm referring to the screws inside the battery holder
I managed to use a T10 bit for removing one, but T8 worked for both screws.
@@pfeerick I wonder if there's some variation. I just did mine this afternoon and the 5 on the outer case were T10 and the two that hold the halves of the cell pack together were T8. FWIW the manufacture year is 2017 and the original cells were LG (marked LGDAHB21865)
@@GeoffSteeleAU That sounds pretty much the same as mine. I was only responding to the question of the "two screws inside the battery holder". Outer screws were all T10. Date on my pack was 2014. Not sure offhand what brand the cells were.
Looks great… wondering about the model/capacity of the spot welder …
Thanks for watching! Here's a link to the spot welder (affiliated) amzn.to/46mPUQe
That’s funny, I’ve just decided a few hours ago I was going to fix a battery of mine which is the exact same battery. Must be a common thing with the 1.5ah batts, because the 4ah batt of the same age is still good. They’re about 12 years old.
I just ordered Sony xtc-6 cells for 10 bucks each.
Excellent tutorial
Thanks for watching!
I'd like to know how you repaired the leads attaching them back to the batteries once in place. Why did you not show that part? They were spot welded before. Did you just solder them back on?
Since no one replied yet I will. What he used, and really the only way, is a spot welder. You can find them inexpensive around 50 bucks and then you have to cut and bend the strips out of a roll. I tried to reuse mine but the metal is too thick for my hobby level spot welder.
I did try to solder before getting this tool but it just doesn't work. The amount of heat needed feels.....unsafe lol. This is so much easier to do and once I had the tool I find myself repairing all types of battery powered things. Even making my own packs for things
Link to spot welder?
Hey there, thanks for watching! The spot welder is the Sequre SQ-SW2 - here's a link to the spot welder (affiliated) amzn.to/46mPUQe
Great video, thanks
Glad you liked it! Thanks for watching!
Greetings friend. Please tell me. The third LED on the accumulator blinks.What's the breakdown?
Haven't encountered this before. Potentially a faulty BMS. Have you measured the individual cell voltages?
I have Panasonic CGR18650CG as replacements. Have you used these before?
Hi there, I had a look at the datasheet, looks like the Panasonic CGR18650CG can only discharge at about 4A, which is not high enough for power tools. I highly recommend using 18650 batteries with atleast 15A discharge rate.
Do you know if there's any difference in the BMS for the 1P and the 2P batteries? Also do they manage the output?
Hi there, thanks for watching! The main difference I would expect is that the charge time would be doubled if you go from 1P to 2P. The BMS should still balance the voltages all the same. Output wise, it would cutoff once the pack voltage gets too low (not sure what the cutoff voltage is). Were you hoping to increase the runtime of the battery pack by adding extra set of cells in parallel? That should work, but you'll need an enclosure that fits the extra cells. If you do have say a 4Ah enclosure but a BMS from a 1.5Ah pack, it should be fine to use the 1.5Ah BMS for a 2P configuration to be housed in the 4Ah enclosure. Hope that helps!
Could you use 21700 cells in the old case will there be slight gaps in the case?
I don’t think they’d fit.
If you did find a way to fit them, the other thing to check would be if the 21700s are lithium ion or LiFePO4 as different chemistries have different nominal voltages.
The Ryobi ONE+ BMS is designed for lithium ion cells.
No to thick
Doesn’t have to be a spot welder or will a regular welder work? A spot welder is just as expensive as a new battery at over $40 even for a cheap one.
No, it has to be a spot welder as regular welder would overheat the battery and probably cause fire!
I have replaced all the cells (10 of them) and it is charging as it should and i get all 4Ah out of it, but if i don't use it, it will discharge itself after two weeks.
Does anyone know what could be wrong with my Ryobi battery?
If i use a thermal camera i can see a double diode get warm and one resistor and i believe this is discharging the battery, but why?
Any tips?
Can you not just add the new cells in parallel ??
I am planning to just add the extra cells to the existing cells in parallel. Can't find a video, is it possible ?? I would be keeping the same BMS.
Unless the original battery pack was still in excellent condition, I would not recommend it, as the new batteries will be doing all the work, and will deteriorate a lot more rapidly than if you replaced the worn out / faulty cells. You clearly won't be able to reassemble the battery pack anyway, and the BMS board may not work as well as a 4Ah one, which is somewhat what the pack would become. i.e. it may have higher rated or more output mosfets paralleled.
What brand and model cells were in there before you replaced them?
Thanks for watching! In this case, Samsung INR18650-15M. But the table in this reddit post might be helpful for your particular 18V battery Ah rating/year and place of manufacture: www.reddit.com/r/ryobi/comments/oxn53g/psa_ryobi_is_using_chinese_18650_cells_in_most_of/
What if i use muRata Vtc4 30A 2100mAh? Will the amps be too much?
Ha. That's is what I'm wondering too.. Hookup--no?
that will work great, 30A is plenty of discharge current!
Now Ryboi some come with 4 screws on bottom and you can remover the side..if you are buy check it has screws,
Does anyone else see a pattern with which cells fail in these batteries? I see certain cells in a particular position failing. The cells in my batteries are Samsung, which are considered good cells, by many.
Interesting, I didn't take note of this before. Perhaps those cells go out of balance over time, which happens across many cycles but could also happen early if the BMS is faulty.
I've rebuilt many of these Ryobi batteries. I haven't seen any particular pattern of failure. What did you observe???
@@test-193 someone over on another forum said that Ryobi's design with their BMS had it burning out/failing much sooner than other big tool companies. They seemed to be saying that the BMS fails before the batteries ever run out in a lot of cases. Have you seen this?
Any one know who sells BMS?
You can find Ryobi ONE+ compatible BMS board on ebay or aliexpress and they will get the job done but are not original. If the cells are faulty and BMS is working in a Ryobi battery pack, you can use that.
Thanks seem more are getting in to repairs..trying to find a working spot welder..
Thanks for the video, but you should really use the safety glasses your spoke about . 😄
Thanks for watching and well spotted!
you forgot to mention the part where you throw the dead batteries into a lake
I eish u spoke slower and do a closer view and keep your fingers out of the way so i can copy down the details of the batteries u showed. Thanks 4 video I'm a Novice to doing this.
Those aren't the old ryobi batteries. The old ones have a black body
Wrong. May depend on the model of the battery pack. I have this model and the cells are green, exactly the same as in this video.
@rogerwilco5187 the original batteries were all, black! The tool bodies were originally black and blue "before" they changed to the green color they are now. I have several tools of that era.
@@charlesr.beasley6222 Oh, I misunderstood. I thought that you meant the cells that were already in there weren't the originals, but you were referring to his remark about it being an old battery. It didn't occur to me that you'd be referring to what are long obsolete batteries when the video is obviously about the ONE+ batteries.
@rogerwilco5187 the black batteries were referred and labeled ONE+ before they were green, yellow labeling.
Depending on the age of the battery pack, you will find different cells within. But as long as it uses 18650 batteries inside, you can follow my method.
Not worth fixing, replacement batteries are too expensive.
18650s are only a few dollars each for quality ones. Way cheaper to rebuild like this than buying all new
eve25 cells go one sale at the 18650 battery store for $2 a cell.