I want thank you very much for this video. My batteries died cause I did not fly for some time. I just revived them an hour ago. Working like new. Thanks again.
0 volt TB47 back operational. Yesterday I had a battery NIB that I never opened from November 2018. well when I made an adapter to fit the factory battery connector and measured 0.93vdc-yeah 0. the charger was doing nothing and flashed like yours for about 10 seconds and go out. Well I removed the cover and logic board cable and just like you placed alligator clips on the 2 leads. Youre correct the factory charger will not charge being so low. I went and being a hobbyist and grabbed my HiTech good LIPO charger and made an adapter to accept the alligator clips. when I tried to charge it it would read "connection break" because it was at 0vdc. so to circumvent that I had to start and stop the charger repeatedly (15 times) because it you hit the battery with the 26v for 2 seconds until the "connection break" terminated the charge cycle for safety. after about 15 times the battery not had a steady 3.4 volts which now I was about to change my lipo settings from 6s to 1s. I charged it on 1s for about 3 minutes, stopped it cooled off and repeated watching the capacity being charged in which was about 20mah. Now I stepped it up to 3s and repeated the process for 2 cycles of 2 min with cool off time. 3s, 4s again the same basically stepped up the voltage to 6s until I had about 3000+mah in the pack and cooled/settled to a steady resting voltage of 22-23vdc. I buttoned everything back up plugged in the logic board and connected the factory charger to complet the charge which it did. I let it rest and on the app it gave me a battery warning of a bad cell when I looked at the cells in the app with the motors running (no props) idle for a bit I saw cell 4 was a tad lower than the rest were all equal. After draining is down to 15% placed it on the factory charger and the next cycle no warning and all cells were equal in capacity and temp was great. All this to say it is absolutely possible to resurrect a tb47/tb48 from 0.95vdc to health as longs as the cells were originally healthy. my battery terminals has a slight greening coating on them but messing with the alligator clips eventually gave me enough to charge. also to note while I had my brand new 0.95vdc tb47 on the operating table while I was forcing voltage to it my multimeter read 1 about the entire time so I went off of my rc lipo charger reported voltage and timer for reference. alls well and the pack is perfect.
Thanks to you I just resurrected my TB47 that was completly dead with total voltage of 1V. I demounted the cover, soldered into + and - leads and charged via Lipo charger. At the beginning as NIMH battery until voltage reached 4V,, with small amperage 0,1A. Then slowly as 1S, 2S and as it reached 12V it stopped charging. I thought two cells are dead and won`t get up. But as battery cooled down, votage started raising again until it reached 18V. At this moment I connected back the board and started charging by dji charger. It got fully charged and battery is working fine.
a Li-HV battery that has been left so long at such low voltage is definitely compromised even if you have resurrected it, it will be a battery that will give you very little overall power and it will be at high risk during flight, the energy could drop quickly and not allow you to land safely or even cause a disastrous crash. You cannot play with these identified flying objects.
@@claudiocosterni6488 totally understand but it hasnt failed me yet i have about 20 cycles through it and it grants me average flight times. I am skeptical but hasnt failed me yet to warrant an insurance claim.
Thanks for the video. It worked for me, i used 3 intervals of 5-6 minutes, but I got surprised by the last couple of 2 minutes. It went all of a sudden really fast and I loaded it up to 22.2v... When I just hooked up the connector, and put it on - I heard a hissing sound at the battery. I was shocked and certainly not expected this. So I put it outside on the concrete. After putting it off it still hissed. (can only hear this when your really close) after 5 min it stopped and the indicator lights still act normal as in it is on 'low' What do you guys think? Normal because of the little overload? Try to charge it?
thanks for your insight, worked a treat, battery is as demonstrated now charging correctly with no adverse affects, I guess this battery control circuit is too smart for its own good, and with that DJI customer service are Effing useless with an outcome or remedy for this inherent failure, but would advise if the battery pack has signs of bulging sides then the risk of an explosion/fire could be the result.
yeah they sent me two dead TB48s and told me to keep them don't send them back because of lipo battery shipments won't allow residential address to send hazardous material out. 6 months they finally send me new replacement batteries. DJI customer service will be their downfall once it starts catching on, I hope they improve it but wow, it was a nightmare dealing with them. So basically if I get these two Dead ones working a big fu to DJI and that's my payment for dealing with their crappy customer service nightmare. If I never followed up on these guys they would've most likely never replaced my dead batteries they sent out.
can't you just pop the cap disconnect the board and plug it into the battery like normal let it charge for 30mins or whatever...then plug the board back in then charge like normal with the cap on? Seems like that is essentially what you're doing with the neg and pos wire/clamp setup you made.
@@trlrace Yeah, I was wondering why you kept it on the charger at a reading of 29V when the battery is only rated at 22.2V. I know you can/must go past the rated voltage a little in order to charge the battery, but having a sustained overage for a prolonged period of time can start to damage the insides. Sounds like what happened in your case. A neat video nonetheless.
It’s because he made a mistake. His MM was set to AC not DC - so it wasn’t actually 29v DC. That would have FAR exceeded the max voltage of these batteries at 26.1V.
so yes and no. the battery came back to life but killed it by over charging it, now one on the cells is broken, right now i only use it to set up and change the setting before flight
Tried this with a few batteries which hasn't been used for a few years. 0 reading on the multimeter to begin with and I took the batteries up to 23v but found that when I then reconnected and charged the battery didn't actually increase its charge and the drone wouldn't recognise the battery. Anyone else seen this issue. I have 6 dead batteries out of 7........real annoying
I tried this on two of mine and worked for one thanks but the other one just won't do anything but red and one green flashing all the time... I thinks its for the dji heap lolshame batteries are so darn dear to have these problems...
Whats the name of the cable i have a 6s balance lead ready to chop up whats the other conector that goes in to the inspire 1 battery be intrested in making my own?? Any help would be awsome thanks
I want thank you very much for this video. My batteries died cause I did not fly for some time. I just revived them an hour ago. Working like new. Thanks again.
Just worked for me only had it on for about 15 minutes. Thanks!
0 volt TB47 back operational.
Yesterday I had a battery NIB that I never opened from November 2018. well when I made an adapter to fit the factory battery connector and measured 0.93vdc-yeah 0. the charger was doing nothing and flashed like yours for about 10 seconds and go out.
Well I removed the cover and logic board cable and just like you placed alligator clips on the 2 leads. Youre correct the factory charger will not charge being so low. I went and being a hobbyist and grabbed my HiTech good LIPO charger and made an adapter to accept the alligator clips.
when I tried to charge it it would read "connection break" because it was at 0vdc. so to circumvent that I had to start and stop the charger repeatedly (15 times) because it you hit the battery with the 26v for 2 seconds until the "connection break" terminated the charge cycle for safety.
after about 15 times the battery not had a steady 3.4 volts which now I was about to change my lipo settings from 6s to 1s. I charged it on 1s for about 3 minutes, stopped it cooled off and repeated watching the capacity being charged in which was about 20mah.
Now I stepped it up to 3s and repeated the process for 2 cycles of 2 min with cool off time.
3s, 4s again the same basically stepped up the voltage to 6s until I had about 3000+mah in the pack and cooled/settled to a steady resting voltage of 22-23vdc. I buttoned everything back up plugged in the logic board and connected the factory charger to complet the charge which it did.
I let it rest and on the app it gave me a battery warning of a bad cell when I looked at the cells in the app with the motors running (no props) idle for a bit I saw cell 4 was a tad lower than the rest were all equal. After draining is down to 15% placed it on the factory charger and the next cycle no warning and all cells were equal in capacity and temp was great.
All this to say it is absolutely possible to resurrect a tb47/tb48 from 0.95vdc to health as longs as the cells were originally healthy.
my battery terminals has a slight greening coating on them but messing with the alligator clips eventually gave me enough to charge.
also to note while I had my brand new 0.95vdc tb47 on the operating table while I was forcing voltage to it my multimeter read 1 about the entire time so I went off of my rc lipo charger reported voltage and timer for reference.
alls well and the pack is perfect.
Thanks to you I just resurrected my TB47 that was completly dead with total voltage of 1V. I demounted the cover, soldered into + and - leads and charged via Lipo charger. At the beginning as NIMH battery until voltage reached 4V,, with small amperage 0,1A. Then slowly as 1S, 2S and as it reached 12V it stopped charging. I thought two cells are dead and won`t get up. But as battery cooled down, votage started raising again until it reached 18V. At this moment I connected back the board and started charging by dji charger. It got fully charged and battery is working fine.
@@buartek thats great glad it worked out I dont get the battery warning anymore either on my 2018 tb47.
a Li-HV battery that has been left so long at such low voltage is definitely compromised even if you have resurrected it, it will be a battery that will give you very little overall power and it will be at high risk during flight, the energy could drop quickly and not allow you to land safely or even cause a disastrous crash. You cannot play with these identified flying objects.
@@claudiocosterni6488 totally understand but it hasnt failed me yet i have about 20 cycles through it and it grants me average flight times. I am skeptical but hasnt failed me yet to warrant an insurance claim.
Led nr 1 flashing kinda fast and red light is on. Is it charging? Been at the charger for like 15 minites
Thanks for the video.
It worked for me, i used 3 intervals of 5-6 minutes, but I got surprised by the last couple of 2 minutes. It went all of a sudden really fast and I loaded it up to 22.2v...
When I just hooked up the connector, and put it on - I heard a hissing sound at the battery. I was shocked and certainly not expected this. So I put it outside on the concrete. After putting it off it still hissed. (can only hear this when your really close)
after 5 min it stopped and the indicator lights still act normal as in it is on 'low'
What do you guys think? Normal because of the little overload? Try to charge it?
Throw it away, this is all wrong and destroys the battery
thanks for your insight, worked a treat, battery is as demonstrated now charging correctly with no adverse affects, I guess this battery control circuit is too smart for its own good, and with that DJI customer service are Effing useless with an outcome or remedy for this inherent failure, but would advise if the battery pack has signs of bulging sides then the risk of an explosion/fire could be the result.
yeah they sent me two dead TB48s and told me to keep them don't send them back because of lipo battery shipments won't allow residential address to send hazardous material out. 6 months they finally send me new replacement batteries. DJI customer service will be their downfall once it starts catching on, I hope they improve it but wow, it was a nightmare dealing with them. So basically if I get these two Dead ones working a big fu to DJI and that's my payment for dealing with their crappy customer service nightmare. If I never followed up on these guys they would've most likely never replaced my dead batteries they sent out.
can't you just pop the cap disconnect the board and plug it into the battery like normal let it charge for 30mins or whatever...then plug the board back in then charge like normal with the cap on? Seems like that is essentially what you're doing with the neg and pos wire/clamp setup you made.
+THY BCX no. The point is that you need to monitor the voltage. If it goes past 22 i think you will kill it. I think i mentioned it on the video.
@@trlrace Yeah, I was wondering why you kept it on the charger at a reading of 29V when the battery is only rated at 22.2V. I know you can/must go past the rated voltage a little in order to charge the battery, but having a sustained overage for a prolonged period of time can start to damage the insides. Sounds like what happened in your case. A neat video nonetheless.
It’s because he made a mistake. His MM was set to AC not DC - so it wasn’t actually 29v DC. That would have FAR exceeded the max voltage of these batteries at 26.1V.
This worked for me on my M600 Pro and a TB47s battery, thanks (Y)
So did the battery start working and charging normal?
so yes and no. the battery came back to life but killed it by over charging it, now one on the cells is broken, right now i only use it to set up and change the setting before flight
@@trlrace I did this to 2 batteries , can anything be done with them ? How do I make sure not to do it again
The multi meter was set to 600v AC...
Tried this with a few batteries which hasn't been used for a few years. 0 reading on the multimeter to begin with and I took the batteries up to 23v but found that when I then reconnected and charged the battery didn't actually increase its charge and the drone wouldn't recognise the battery. Anyone else seen this issue. I have 6 dead batteries out of 7........real annoying
I tried this on two of mine and worked for one thanks but the other one just won't do anything but red and one green flashing all the time... I thinks its for the dji heap lolshame batteries are so darn dear to have these problems...
Dose this work on the phantom 4
No - the P4 actually has to be software flashed and reset specially if you disconnect the BMC from the leads. Don’t repeat what you see here for a P4.
What about p4pro?
For what is that? Does it place in GTR?
+Zaur Veliyev no. It for a DJI INSPIRE 1 drone
Sweet! I just bought an I1 with 5 batteries and 1 is dead, I will surely give this a try.
And it worked!!! awesome and thank you for the help.
I’m glad it worked out
Whats the name of the cable i have a 6s balance lead ready to chop up whats the other conector that goes in to the inspire 1 battery be intrested in making my own?? Any help would be awsome thanks
If you have one badcell the battery will explode in your face. This is very dangerous!!!! Battery should be balance in a real lipo charger
4 months? I’ve left mine for like 4 years? Batteries completely shot! 😳
you can bring it back for sure if you have patience.
no vid
Works very well but will only need about 15 min on charger lol