Excellent video. Just to let your readers know, my issue is/was that a couple of the wires at the balance connector itself broke from the pins in that connector. I asked my trusted local Hobby store what I could do and it turns out, they sell the balance connector with the wires as a pigtail so I'll be using your tutorial to repair my LiPo which had fewer than 50 charge cycles on it. You're beautiful for posting this. Thank you.
Great vid, Rich. The first time I did this, I was a bundle of nerve because I have seen how exciting it can be when things contact things they shouldn't. I do everything exactly as you demonstrate, but add a couple of drops of 5 min epoxy on the solder joints of the small wires...just to give them a bit more resilience to flexing and breaking off again.
Great. Thanks man. I really thought my $100 battery was done but after watching your video I fixed it in no time. Matter of fact I had a few batteries that needed this and I just didn't know. So I got a cell tester and tested all my packs. After fixing all the broken ones now I have all good batteries. Thanks for the info. It helped big time.
I've done this a few dozen times with all my HK lipo's. Here's the glitches: 1.) Must skillfully cut/peel back all the layers of covering. 2.) Must have "super" hot soldering iron to melt the original "non-leaded" solder. 3.) Use a 2nd wire between contact and balance wire. Make it slightly longer so you can tuck excess under. Now the solder joint won't get directly bent/stressed.
Great informative video about a scary object! When one of those wires cross-contact, it's pretty exciting to say the least. I do all that you do, plus add a bit of epoxy at the stress areas where the balancing leads join the battery leads. I figure this helps prevent the inevitable breakage again.
What size of soldering iron are you using? Also, I have seen videos where the tabs are aluminum and cannot be soldered by tin solder. Are the new lipos using tabs more conducive to soldering with more common solders? Thanks
Thanks so much!!! After watching your video I realized that it was kind of obvious but, well... I not a fan of playing with fire in my desk... Hahahaha, especially with wooden floors, a mistake like that could cost the whole house. But now it's all fixed thanks!
أنا عادة ما تأخذ الرعاية من البطاريات يبو بلدي ولكن مؤخرا واحدا من رصيدي يؤدي ، وربما الخروج من البلى اندلعت الضرر حالا، على أية حال ساعدت هذه الطريقة لا بأس به، وأنا أقدر ذلك ، شكرا لك.
You have a balance wire loose that is intermittenly showing/disconnecting one of the cells. It is possible it could be the pin. connect your tester and wiggle one wire at a time and try to figure out which one is the bad connection.
Great video this will be helpful in the future. At 8:18 in the video there is a flightmaxx 4000mah batt in the background that looks puffed. I have a 5000 mah venom 7.4 2s hard pack that is slightly puffed. It hasn't gotten worse and voltage seems to be stable. Do you have any thoughts on it is it safe to use? I always balance charge and store at 3.85 volts per cell. Thanks
Still not sure if I get the Question? However, when balance charging batteries, they do not always perfectly balance... you will often see + or - a few hundredths of a volt between cells on the balance display after charging. Essentially they are close enough and considered balanced. In the case you describe you would see either 4.10 or 4.09 on the balance display, the internal logic of the balancer would have to decide...
I'm trying to understand if there's any "information loss" as a result of hooking the balance taps in parallel. For instance, if some pair of cells that are hooked in parallel have one cell @4.10 and the other @4.09, how would that look in the balancer? If that still doesn't make sense, would appreciate a reference to some guide about parallel hooking of batteries. Thanks again.
You'll lose a little length but if you solder the black, white & red wires so they are facing toward the blue & yellow wires instead of away & then bend the 3 wires over so all 5 of the wires are facing out in the direction they should. Place a good dab of hot glue over the bunch of wires where the three are bent & extend to the side where the wires exit the pack. That should hold the wires still on the solder connections while allowing the wires to bend more naturally at the edge of the pack.
Just wondering, you hook up the balance taps in parallel as well, so in the end each single wire in the tap represents two cells. How can you distinguish the bad one from the good? Or balance whichever needs to be? Sorry, new to this field. Thanks
I'd like to suggest using a little hot glue to stabilize the soldered ends of the wires. If they are surrounded by a small blob of the solidified glue, then any flexing occurs in the jacketed part of the wire and not right at the soldered joint. They should last the lifetime of the pack after that. :¬)
@@RCINFORMER bro I ask from many RC RUclipsrs I can't get answer all are saying sry I didn't know etc. Please ask from someone u know who can give answer I want to know please help me and tell me it's my very humble request😿!
I am having a problem with my 11.1V 3S..When I connect it to the charger, it is registering there is a fault in the battery, I wiggle it around a bit and it starts charging again. Also, when I plug my voltage tester into the charging port, it is registering as a 2S battery unless I fiddle around and then it registers as 3S. I followed your instructions, pulled back the protective tape and everything is intact, soldering, wires and all. Could it be one of the four small metal pins? Thanks
Just had a 3s lipo do this to me.. Im seriously scared to do this.. If you could make a video of how you cut into the battery and get to the board, I would feel more confident in doing it. I just don't want to lose a good 3s pack..
This is such an old video but maybe someone can help me out. The solder on my battery tabs is not melting. I even got a 100W solder gun for this but I can't seem to desolder the existing wires. Should I just cut them and solder on top?
That's an old battery that needs to go:) How safe is it? That"s a good question. I will usually use it if still it holds a charge, but being that puffed it is probably not a great idea.
+mariobeans If it actually broke of, the positive lead did not have contact with the heli, there is absolutely no chance that it worked. No chance what so ever. Or if so, I guess you have solved the whole worlds energy needs.
Also. I think I might need some of the little metal connectors on the ends of each wire. I can't seem to remove them from the connector and refit them solidly in the new connector.
Edward Silva We are the professional Li-Polymer battery manufacturer in China , With high quality and competitive price, Any requirements please contact us , www.clcell.com jane@clcell.com
Possibly one of your balance wires is broken somewhere, usually it breaks on the battery side, you could also have a problem with the white balance connector, wiggle the wires as you begin to charge and you may see the other cell on the display again.... rich
I have a turnigy 3 s battery. the charge port is melted abit. I need to put replacement. Is there a way I don't have to do this procedure and just cut the port off and attach the new one ??? Please respond as soon as you can please
RCINFORMER Hi RC Informer, I recently bought a couple packs of high C rate li-po to replace the cheap 600mah 3.7v that came with my mini ("mid size") helis, that I bought from xheli.com. JDX 333 3Ch R/C Helicopter www.bananahobby.com/genesis-power-2s-7-4v-850mah-65c-pete-signature-series-rc-lipo-battery-pack.html I simply un-soldered the two cell to divide it in to single cell pack. This gave my indoor helis almost too fast of vertical performance. These batts seemed to be a good value, although they don't seem to be the advertised 65C. I would say they are closer to 35C. One question. Am I going to be o.k. not using the tiny circuit board that came soldered on the two cell pack. I just threw them away? So far no problem. I also got some generic single celll 200mah cell (banggood.com) for my 4ch micro helis, only to have these cheap battery burn out two of my micro helis (syma f3 and Vl toys v911) I noticed that the voltage was up and down and all over the place during initial charging and up on disassemble, I found no circuit board on the internal leads. Now my syma F3 goes in to full throttle in REVERSE rotation, when I connect any battery and my v911 is completely dead. I am afraid to use any diy pack on my best v911 clone heli, the Hero V911 from xheli. Could the cheap generic batteries have been shortening out intermittently, causing the heli boards to burn out?
I don't like the idea of making 3 of the balance leads shorter without also removing the other two and adjusting their length to avoid all of the strain being on the short wires. Much better to remove all of the balance wires and adjust their length before re-soldering them. It is also a good idea to put heat shrink around the bunch of balance wires at the point where they exit the Lipo so that any strain on them is not transferred directly to the individual soldered contacts.
my lipo is not showing voltage at all i looked at all the connectors they seem in good condition i touched the red ad black when i was wiireing it to deans i cant figure out whats wrong please help!
for me it's easy fix cuz i have a soldering skill butt for other's I don't think so... also the wire ripping out isn't common I have been working with RC LiPO batteries for 2 years and I never had any wire ripout
Keep setting a dangerous example - charging/using totally puffed lipos, not taping off the leads when the lipo is disassembled, and failing to remove the rubber seal from the ammo "case" (sic). Finally learned to use the Reply function in the past 5 years eh? #douchebagruiningthehobby
TweakRacer Your simply one of few haters out there! I guess you are the little angry panda guy as your avatar suggests:) I have had tremendous positive feedback to this video as many folks have saved lots of packs they thought were gone. Keep on being a hater and see where it gets you! Good luck with that:) I never delete posts. I will not delete your posts as it shows your true colors and you are really making yourself look bad. However, you may want to delete them as your comments do you harm... again, good luck with that:) #angrylittlepandaguy
That's an old battery that needs to go:) How safe is it? That"s a good question. I will usually use it if still it holds a charge, but being that puffed it is probably not a great idea.
Excellent video. Just to let your readers know, my issue is/was that a couple of the wires at the balance connector itself broke from the pins in that connector. I asked my trusted local Hobby store what I could do and it turns out, they sell the balance connector with the wires as a pigtail so I'll be using your tutorial to repair my LiPo which had fewer than 50 charge cycles on it. You're beautiful for posting this. Thank you.
Great vid, Rich. The first time I did this, I was a bundle of nerve because I have seen how exciting it can be when things contact things they shouldn't. I do everything exactly as you demonstrate, but add a couple of drops of 5 min epoxy on the solder joints of the small wires...just to give them a bit more resilience to flexing and breaking off again.
Great. Thanks man. I really thought my $100 battery was done but after watching your video I fixed it in no time. Matter of fact I had a few batteries that needed this and I just didn't know. So I got a cell tester and tested all my packs. After fixing all the broken ones now I have all good batteries. Thanks for the info. It helped big time.
Hi, I just follow your detailed instructions and repair a 1300 mA 3S LiPo.
Thank you very much.
I've done this a few dozen times with all my HK lipo's. Here's the glitches: 1.) Must skillfully cut/peel back all the layers of covering. 2.) Must have "super" hot soldering iron to melt the original "non-leaded" solder. 3.) Use a 2nd wire between contact and balance wire. Make it slightly longer so you can tuck excess under. Now the solder joint won't get directly bent/stressed.
Awesome video. Had a few batteries like this, and was going to dispose of them. Now they are all repaired. Once again thanks....
Yo bro! Watched your video....gave me confidence.....saved me fom an $80 6S lipo replacement......thanks brother!
Nice!
Great informative video about a scary object! When one of those wires cross-contact, it's pretty exciting to say the least. I do all that you do, plus add a bit of epoxy at the stress areas where the balancing leads join the battery leads. I figure this helps prevent the inevitable breakage again.
Thanks this great tutorial Rich! I now have 5 more batteries to use that I have now repaired.
Hey thanks for the fast response! I got some gremlin chasing to do.
awesome video, I have a 4S battery with a broken lead....Need to try this carefully like you said and follow your instructions
Thanks...Fred
What size of soldering iron are you using? Also, I have seen videos where the tabs are aluminum and cannot be soldered by tin solder. Are the new lipos using tabs more conducive to soldering with more common solders? Thanks
Thanks so much!!! After watching your video I realized that it was kind of obvious but, well... I not a fan of playing with fire in my desk... Hahahaha, especially with wooden floors, a mistake like that could cost the whole house. But now it's all fixed thanks!
Thanks for the how to. If possible id like a how to on changing the prop shaft on a motor. Thanks again.
Outstanding! I was hoping this would save some batteries for everyone :)
Excellent video, thx so much for making it.
Good job! Alot of information and caution on ur part.
Thank you. You just saved me over $100!!!
أنا عادة ما تأخذ الرعاية من البطاريات يبو بلدي ولكن مؤخرا واحدا من رصيدي يؤدي ، وربما الخروج من البلى اندلعت الضرر حالا، على أية حال ساعدت هذه الطريقة لا بأس به، وأنا أقدر ذلك ، شكرا لك.
You have a balance wire loose that is intermittenly showing/disconnecting one of the cells. It is possible it could be the pin. connect your tester and wiggle one wire at a time and try to figure out which one is the bad connection.
Great video this will be helpful in the future. At 8:18 in the video there is a flightmaxx 4000mah batt in the background that looks puffed. I have a 5000 mah venom 7.4 2s hard pack that is slightly puffed. It hasn't gotten worse and voltage seems to be stable. Do you have any thoughts on it is it safe to use? I always balance charge and store at 3.85 volts per cell. Thanks
Good vid, thanks. Is the red wire connected to positive and all the other wires connected to the negative leads?
Still not sure if I get the Question? However, when balance charging batteries, they do not always perfectly balance... you will often see + or - a few hundredths of a volt between cells on the balance display after charging. Essentially they are close enough and considered balanced. In the case you describe you would see either 4.10 or 4.09 on the balance display, the internal logic of the balancer would have to decide...
That may the end of the battery...Often that happens when the battery is discharged to much...how old is it?
I'm trying to understand if there's any "information loss" as a result of hooking the balance taps in parallel. For instance, if some pair of cells that are hooked in parallel have one cell @4.10 and the other @4.09, how would that look in the balancer? If that still doesn't make sense, would appreciate a reference to some guide about parallel hooking of batteries. Thanks again.
Lengthening the wire is a good idea.... thanks!... rich
You'll lose a little length but if you solder the black, white & red wires so they are facing toward the blue & yellow wires instead of away & then bend the 3 wires over so all 5 of the wires are facing out in the direction they should. Place a good dab of hot glue over the bunch of wires where the three are bent & extend to the side where the wires exit the pack. That should hold the wires still on the solder connections while allowing the wires to bend more naturally at the edge of the pack.
Just wondering, you hook up the balance taps in parallel as well, so in the end each single wire in the tap represents two cells. How can you distinguish the bad one from the good? Or balance whichever needs to be? Sorry, new to this field. Thanks
I'd like to suggest using a little hot glue to stabilize the soldered ends of the wires. If they are surrounded by a small blob of the solidified glue, then any flexing occurs in the jacketed part of the wire and not right at the soldered joint. They should last the lifetime of the pack after that. :¬)
Excellent, glad it helped out!
My Onyx 3s is covered in that insulating tape.. Did you have to cut off some of yours to lift it off in your battery?
Is 3S 2200mah 11.1 v zop power is good for 90mm 6blade or 70mm12 blade motor?? Reply please
I am unfamiliar with using those battery so I'm not sure
@@RCINFORMER bro I ask from many RC RUclipsrs I can't get answer all are saying sry I didn't know etc. Please ask from someone u know who can give answer I want to know please help me and tell me it's my very humble request😿!
Awesome, Glad it helped you out!
Can you charge your pack using only the balance leads?
hey thanks for the video it helped alot
Awesome, glad I could help out :)
I am having a problem with my 11.1V 3S..When I connect it to the charger, it is registering there is a fault in the battery, I wiggle it around a bit and it starts charging again. Also, when I plug my voltage tester into the charging port, it is registering as a 2S battery unless I fiddle around and then it registers as 3S. I followed your instructions, pulled back the protective tape and everything is intact, soldering, wires and all. Could it be one of the four small metal pins? Thanks
Great video, can this be done with hardcase lipos?
not sure... be careful not to damage the battery removing the case
RCINFORMER thank you for the reply, i trimmed the case away, so I have access to the same image you had yours. So now it is just soldering I guess?
Just had a 3s lipo do this to me.. Im seriously scared to do this.. If you could make a video of how you cut into the battery and get to the board, I would feel more confident in doing it. I just don't want to lose a good 3s pack..
Very Good....Thanks my friend
Great Video
how does the balance plug work for pluging in tx and camera..........thanx........which wire for 12v and which for 5v.............thanc...
This is such an old video but maybe someone can help me out. The solder on my battery tabs is not melting. I even got a 100W solder gun for this but I can't seem to desolder the existing wires. Should I just cut them and solder on top?
That's an old battery that needs to go:) How safe is it? That"s a good question. I will usually use it if still it holds a charge, but being that puffed it is probably not a great idea.
Great video can u show ua a video if how to change a 4s to 3s battery?
thanks
Contact cement may also be a good thing to use there.... ill have to try that:)
my positive lead broke off my 3.7 600mah lipo but it still worked. I still soldered it back on but im wondering why it still worked
+mariobeans If it actually broke of, the positive lead did not have contact with the heli, there is absolutely no chance that it worked. No chance what so ever. Or if so, I guess you have solved the whole worlds energy needs.
Also. I think I might need some of the little metal connectors on the ends of each wire. I can't seem to remove them from the connector and refit them solidly in the new connector.
Embarrassing, the comment should have went to another vid that demonstrates charging paralleled packs, but you did answer my question, thanks!
Why didn't you use electrical tape to cover the contacts before you soldered?
+pofrani good idea!
Do you know where I can pick up some ZIPPY JST-XH 8 cell connectors?
Edward Silva We are the professional Li-Polymer battery manufacturer in China , With high quality and competitive price, Any requirements please contact us , www.clcell.com jane@clcell.com
Possibly one of your balance wires is broken somewhere, usually it breaks on the battery side, you could also have a problem with the white balance connector, wiggle the wires as you begin to charge and you may see the other cell on the display again.... rich
I have a turnigy 3 s battery. the charge port is melted abit. I need to put replacement. Is there a way I don't have to do this procedure and just cut the port off and attach the new one ??? Please respond as soon as you can please
possibly.... I would have to look at it
RCINFORMER C:\Users\Ashley\Downloads\photo (9).JPG C:\Users\Ashley\Downloads\photo (7).JPG
that's 2 pics of the charge port on my battery
RCINFORMER thanks a lot for fast response
RCINFORMER Hi RC Informer, I recently bought a couple packs of high C rate li-po to replace the cheap 600mah 3.7v that came with my mini ("mid size") helis, that I bought from xheli.com. JDX 333 3Ch R/C Helicopter
www.bananahobby.com/genesis-power-2s-7-4v-850mah-65c-pete-signature-series-rc-lipo-battery-pack.html I simply un-soldered the two cell to divide it in to single cell pack. This gave my indoor helis almost too fast of vertical performance. These batts seemed to be a good value, although they don't seem to be the advertised 65C. I would say they are closer to 35C. One question. Am I going to be o.k. not using the tiny circuit board that came soldered on the two cell pack. I just threw them away? So far no problem. I also got some generic single celll 200mah cell (banggood.com) for my 4ch micro helis, only to have these cheap battery burn out two of my micro helis (syma f3 and Vl toys v911) I noticed that the voltage was up and down and all over the place during initial charging and up on disassemble, I found no circuit board on the internal leads. Now my syma F3 goes in to full throttle in REVERSE rotation, when I connect any battery and my v911 is completely dead. I am afraid to use any diy pack on my best v911 clone heli, the Hero V911 from xheli. Could the cheap generic batteries have been shortening out intermittently, causing the heli boards to burn out?
not sure, but it is possible...
Thank you!
What's the gauge of the main output wires?
I don't like the idea of making 3 of the balance leads shorter without also removing the other two and adjusting their length to avoid all of the strain being on the short wires. Much better to remove all of the balance wires and adjust their length before re-soldering them. It is also a good idea to put heat shrink around the bunch of balance wires at the point where they exit the Lipo so that any strain on them is not transferred directly to the individual soldered contacts.
my lipo is not showing voltage at all i looked at all the connectors they seem in good condition i touched the red ad black when i was wiireing it to deans i cant figure out whats wrong please help!
safety tips end at 3:40
Not sure what you are asking...
skip to 5:30
I thought I am the only one using an ammo box for storing my batteries.
for me it's easy fix cuz i have a soldering skill butt for other's I don't think so... also the wire ripping out isn't common I have been working with RC LiPO batteries for 2 years and I never had any wire ripout
Your lipo is way too puffed. Tape off the leads. Learn to use the Reply function.
TweakRacer it was puffed, but holding a full charge and working fine. Learn.
Keep setting a dangerous example - charging/using totally puffed lipos, not taping off the leads when the lipo is disassembled, and failing to remove the rubber seal from the ammo "case" (sic). Finally learned to use the Reply function in the past 5 years eh? #douchebagruiningthehobby
TweakRacer Your simply one of few haters out there! I guess you are the little angry panda guy as your avatar suggests:) I have had tremendous positive feedback to this video as many folks have saved lots of packs they thought were gone. Keep on being a hater and see where it gets you! Good luck with that:) I never delete posts. I will not delete your posts as it shows your true colors and you are really making yourself look bad. However, you may want to delete them as your comments do you harm... again, good luck with that:) #angrylittlepandaguy
Dont feed them with steroids, they look fat! XD
That's an old battery that needs to go:) How safe is it? That"s a good question. I will usually use it if still it holds a charge, but being that puffed it is probably not a great idea.