Hello there I enjoyed your video! Just a quick one my mavic pro battery is coming up battery error on the remote it won’t let me take off how many times should I try to run down the battery completely then fully charge to hopefully balance it???
Phantom 3 uses a LiHV 4S ... never used a 3S pack in any form. Second the batterys do not have a charger built in ... they have a Charge Control board ... which takes the regulated constant voltage from the DJI charger and regulates the AMP rate to complete the charge. Third - for the Phantom 3 series they do not use a standard 4.2v cell ... they use the High Voltage LiPo commonly termed the LiHV which charges to 4.35V for full charge. 4.25V is NOT fully charged and is wrong to even suggest it. The controller batterys C rating does not alter its maintenance in any form ... what makes the controller battery more tolerant is the power demand it has when working is miniscule compared to the flight pack - which means it will not have such voltage drop due to increased internal resistance as the flight pack would. Charging from a normal programmable charger is no problem at all and in fact can be safer as you not only have the batterys charge control board shutting of at full charge - but the charger is a back-up in case of board failure ... something that the DJI PSU cannot do. I often use a LiPo charger set to CHARGE only mode with HV setting ... Low battery warning is only Low battery warning ... when did they decide it will initiate RTH ? Balance mode is actually very poor on at least the P3 series as the control board does not actually enter into protracted balance mode .. it makes a passing gesture at it - but because the total voltage hits 17.4V ... it shuts off before it completes Deep cycling is only a short temporary measure that NEVER recovers any damaged cell. All you get is reset of the charge control counter. LiPo's are accumulative damage items and irreparable. Hovering to discharge is not necessary ... there are plenty of 3rd party discharge items available if you want to waste time on this exercise ... Telsin for example do a discharger that the power can be used to charge your phone / tablet etc. instead of just wasting it. A battery that has a suspect cell is always good for FW updating / bench testing use etc. DJI batterys such as the P3 series will shut down on discharge at 3.0V per cell to avoid damage. 3.7V is a storage lower voltage and is NOT flat !! Far from it in fact. The 'fuel table' you show is the Standard 4.20V cell table and is relevant to a High Voltage Cell only after the top ~10% is used. Salt water discharge is a myth ... you should use a car lamp to discharge the battery ... There is no need to part discharge a battery to be able to top-up charge - all you need do is switch battery on before plugging in charger - it will then over-ride the default and allow that top-up charge. I would never fly a battery that was charged more than 24hrs before. Nice video - but too many errors and falsies.
Nigel, 1: Yes you are 100% Correct on the 4S a Slip and a Mistake that. 2: The internal board is Classe as the charger is layman terms as it performs both the balancing, CV and CC stages of the charge cycle, yes the adapter performs the fixed current regulation and limits however the majority its handleless in the battery these for its simpler to say the charger is on board. 3: DJI class the cells being over 4.25V as being fully charged, I stated these are Lipo HV unto 4.35v however the difference between 4.25v and 4.35v is a few hundred mah and its perfectly fine, again DJI class over 4.25v as fully charged officially. 4: You can not top off many of the later smart batteries with out self discharging, while the P3 allows it the rest often dont and again there is also a technical reason to discharge first to allow the fuel gauge to correctly map the voltage curve as well as balance off the cell's 5:Salt water is not myth, iv done it for years and would suggest you perhaps should try it. 6: Using a standard Lipo charger is just not advisable as giving a piece of advice, we both know it can be done but there are potential issues of doing it and it should never be advised. 7: Fuel table was a guide and nothing more and going beyond 3.7v rested is risky especially with the larger birds and these are extremely low C packs.
" I would never fly a battery that was charged more than 24hrs before"...That is just being too over the top and would suck all the fun out of this as a hobby.
The chart at 14:10 shows 65% capacity is 3.91v. Ideal storage as you mention is 3.85v per cell. This chart is obviously for a normal lipo. Are you saying that with a DJI lipo 65% is actually about 3.85v?
Hi and thanks. Very informative I have a question for you . If I remove the 3 cells from one battery and add them to another battery each one in parallel with the other would this work and would the intelligent battery and the app show the increase in battery storage mah and show correct voltage . Trying to get more flight time I know there are other mods but I want to try this . Cheers cant find the info anywhere .
Great information, I wanna know if you can explain a litte about components of the circuit board, I trying to make a similar circuit but with ESP32 microcontroller and i didn't find information about this
Very informative. Questions: 1) What is the best practices for the new DJI Smart Controller? I had to fly my SC down to 6% today, in order to make it to the end of my job, after flying all 5 batteries. I let it cool, then immediately plugged it into the stock charger to bring it back up. 2) With the drone batteries - after flight, lets say I fly them to about 28-32%, and I get home, and may or may not fly in the next couple days. Is is safe and good practice to plug them in and bring the charge up to about 50%, then unplug them, and charge them fully the day before I know I'm going to fly? Is this ok for the LiPo's?
After I’m done flying and the battery has cooled to room temperature should I charge it and unplug the battery at 65% or leave it at about 20% for storage? I have a Mavic Air 2
Excellent video, thank you. This answered all my questions about my Mavic air batteries batteries. I wonder if you could answer this?......I dropped one of my Mavic air batteries on to a tile floor while connecting it to the charger. It dropped about 3 feet and hit my leg on the way down (I was sitting down), so the fall was interrupted. The drop resulted in a very minor rounding of the corner where it hit. The battery seems to be functioning fine and fits into the drone with no trouble. It’s a new battery; in your opinion is it okay to keep using? Thanks and Happy New Year!
Happy new year. It’s very hard to say but DJI batteries are protected in a plastic shell, chances are as long as there is no swelling, leakage or any strange cell voltage differences then I think you should be ok. Check the Cells in the app and see if they are all in balance.
Think there's any chance of putting the option to set discharge time back in? Right now, the Mavic2's time is set to 10 days with no option to set it different.
Best battery tutorial out there today . I already knew some of this but I learned much more and gained insight as to some of the lesser discussed aspects. Do you know of any way other than flight control to discharge an RC to storage level ? thanks.
Can you make a video or tell us the Best Practice for after you have flown. For example if I land with 20% battery and wait for it to cool do I charge it up fully or partially. If Partially how do I know when charging the correct time to stop? You make lots of references to the problems with keeping batteries fully charged but nothing about the problems with leaving them discharged.
Hmm perhaps I needed to cover this more then, Ok the basics are you are OK leaving them 10-40% for a few days however if your going to not use them for more than 3 days say I would strongly advice charging to about 65%, this is basically just as the 3 LED starts to flash when it’s on charge and simply unplug once it gets to that point. Then simply fully charge once your ready to use. Basically don’t leave them fully charged or discharged for more than a few days. It’s perfectly ok to stop them charging once the 3 LED starts to flash.
Great information once again! New problems with DJI TB50 / 55 batteries after update. "When algorithm detects a difference in SOC levels between the algorithm and actual level greater than 5%, RTH (return-to-home) will be activated and automatic landing activated at 10%. If the difference is less than 5% then no action will be activated". SOME ARE LANDING AT 42% UGH!!!
I still think dji could milk 20% out of their batteires by actuly running them down to the cutoff voltage(3v) or leave a little in the tank and stop at 3.2. They can mitigate the supeise of rapid voltage decrease to the user by deopping the battery percentage sooner. AKA use an algorithm for the battery percent indicator to make it linear, taking into account the rapid droppoff at the end and extrapolating it over the entire flight time
I store my batteries after use at around 25%., sometimes for long periods because of bad weather etc. You don't deal with this in your quite long video, why?, is it not important? Don't DJI batteries go into a "Hibernation" mode too?
It is important however it would have gone on for ever to put everything is. For long term storage I strongly advise storing at 65% then check them ever 30-60 days max. The batteries do enter a long term sleep however it’s not perfect and they will still loose capacity, they should still be checked regularly other wise you don’t want to loose a pack as a result.
@@MadRCThanks for the great video! DJI manual says you should charge stored battery at least each 3 months. By the way will the mavic air battery autodischarge in 10 days (default unchangeable period) if it was not full charged (for example battery had 85% charge)?
We need more teachers / educators to UA-cam like you!
Hello there I enjoyed your video!
Just a quick one my mavic pro battery is coming up battery error on the remote it won’t let me take off how many times should I try to run down the battery completely then fully charge to hopefully balance it???
If it’s the same after 2-3 then it’s for the bin
Phantom 3 uses a LiHV 4S ... never used a 3S pack in any form. Second the batterys do not have a charger built in ... they have a Charge Control board ... which takes the regulated constant voltage from the DJI charger and regulates the AMP rate to complete the charge. Third - for the Phantom 3 series they do not use a standard 4.2v cell ... they use the High Voltage LiPo commonly termed the LiHV which charges to 4.35V for full charge. 4.25V is NOT fully charged and is wrong to even suggest it.
The controller batterys C rating does not alter its maintenance in any form ... what makes the controller battery more tolerant is the power demand it has when working is miniscule compared to the flight pack - which means it will not have such voltage drop due to increased internal resistance as the flight pack would.
Charging from a normal programmable charger is no problem at all and in fact can be safer as you not only have the batterys charge control board shutting of at full charge - but the charger is a back-up in case of board failure ... something that the DJI PSU cannot do. I often use a LiPo charger set to CHARGE only mode with HV setting ...
Low battery warning is only Low battery warning ... when did they decide it will initiate RTH ?
Balance mode is actually very poor on at least the P3 series as the control board does not actually enter into protracted balance mode .. it makes a passing gesture at it - but because the total voltage hits 17.4V ... it shuts off before it completes
Deep cycling is only a short temporary measure that NEVER recovers any damaged cell. All you get is reset of the charge control counter. LiPo's are accumulative damage items and irreparable. Hovering to discharge is not necessary ... there are plenty of 3rd party discharge items available if you want to waste time on this exercise ... Telsin for example do a discharger that the power can be used to charge your phone / tablet etc. instead of just wasting it. A battery that has a suspect cell is always good for FW updating / bench testing use etc.
DJI batterys such as the P3 series will shut down on discharge at 3.0V per cell to avoid damage. 3.7V is a storage lower voltage and is NOT flat !! Far from it in fact. The 'fuel table' you show is the Standard 4.20V cell table and is relevant to a High Voltage Cell only after the top ~10% is used.
Salt water discharge is a myth ... you should use a car lamp to discharge the battery ...
There is no need to part discharge a battery to be able to top-up charge - all you need do is switch battery on before plugging in charger - it will then over-ride the default and allow that top-up charge. I would never fly a battery that was charged more than 24hrs before.
Nice video - but too many errors and falsies.
Nigel,
1: Yes you are 100% Correct on the 4S a Slip and a Mistake that.
2: The internal board is Classe as the charger is layman terms as it performs both the balancing, CV and CC stages of the charge cycle, yes the adapter performs the fixed current regulation and limits however the majority its handleless in the battery these for its simpler to say the charger is on board.
3: DJI class the cells being over 4.25V as being fully charged, I stated these are Lipo HV unto 4.35v however the difference between 4.25v and 4.35v is a few hundred mah and its perfectly fine, again DJI class over 4.25v as fully charged officially.
4: You can not top off many of the later smart batteries with out self discharging, while the P3 allows it the rest often dont and again there is also a technical reason to discharge first to allow the fuel gauge to correctly map the voltage curve as well as balance off the cell's
5:Salt water is not myth, iv done it for years and would suggest you perhaps should try it.
6: Using a standard Lipo charger is just not advisable as giving a piece of advice, we both know it can be done but there are potential issues of doing it and it should never be advised.
7: Fuel table was a guide and nothing more and going beyond 3.7v rested is risky especially with the larger birds and these are extremely low C packs.
" I would never fly a battery that was charged more than 24hrs before"...That is just being too over the top and would suck all the fun out of this as a hobby.
What percentage do you have your batteries at when traveling in a plane. My have a mavic pro platinum. Thanks for your help.
Ideally around 10%, that’s the point where they will be at there most inert really. Storing at low level for short periods is fine.
Excellent information, one of the best tutorial.
The chart at 14:10 shows 65% capacity is 3.91v. Ideal storage as you mention is 3.85v per cell. This chart is obviously for a normal lipo. Are you saying that with a DJI lipo 65% is actually about 3.85v?
Hi and thanks. Very informative I have a question for you . If I remove the 3 cells from one battery and add them to another battery each one in parallel with the other would this work and would the intelligent battery and the app show the increase in battery storage mah and show correct voltage . Trying to get more flight time I know there are other mods but I want to try this . Cheers cant find the info anywhere .
Great information, I wanna know if you can explain a litte about components of the circuit board, I trying to make a similar circuit but with ESP32 microcontroller and i didn't find information about this
Very informative. Questions:
1) What is the best practices for the new DJI Smart Controller? I had to fly my SC down to 6% today, in order to make it to the end of my job, after flying all 5 batteries. I let it cool, then immediately plugged it into the stock charger to bring it back up.
2) With the drone batteries - after flight, lets say I fly them to about 28-32%, and I get home, and may or may not fly in the next couple days. Is is safe and good practice to plug them in and bring the charge up to about 50%, then unplug them, and charge them fully the day before I know I'm going to fly? Is this ok for the LiPo's?
After I’m done flying and the battery has cooled to room temperature should I charge it and unplug the battery at 65% or leave it at about 20% for storage? I have a Mavic Air 2
Very informative! Thank you so much!!
Excellent and practical video!
Can I replace my mavic air battery cells with normal lipo cells??
No really as the smart circuit has some built in protection.
Great info as always
Excellent tutorial Thanks for this info !!
Excellent video, thank you. This answered all my questions about my Mavic air batteries batteries. I wonder if you could answer this?......I dropped one of my Mavic air batteries on to a tile floor while connecting it to the charger. It dropped about 3 feet and hit my leg on the way down (I was sitting down), so the fall was interrupted. The drop resulted in a very minor rounding of the corner where it hit. The battery seems to be functioning fine and fits into the drone with no trouble. It’s a new battery; in your opinion is it okay to keep using? Thanks and Happy New Year!
Happy new year. It’s very hard to say but DJI batteries are protected in a plastic shell, chances are as long as there is no swelling, leakage or any strange cell voltage differences then I think you should be ok. Check the Cells in the app and see if they are all in balance.
Mad RC Thank you! So far, all is good.
Thank you for this. Chock full of useful information. I'll be keeping an eye on my batteries per your recommendations henceforth.
Think there's any chance of putting the option to set discharge time back in? Right now, the Mavic2's time is set to 10 days with no option to set it different.
Dji could do it I just don’t think they will now TBH.
Best battery tutorial out there today . I already knew some of this but I learned much more and gained insight as to some of the lesser discussed aspects. Do you know of any way other than flight control to discharge an RC to storage level ? thanks.
Thanks for the great tips
Thanks
Can you make a video or tell us the Best Practice for after you have flown. For example if I land with 20% battery and wait for it to cool do I charge it up fully or partially. If Partially how do I know when charging the correct time to stop? You make lots of references to the problems with keeping batteries fully charged but nothing about the problems with leaving them discharged.
Hmm perhaps I needed to cover this more then,
Ok the basics are you are OK leaving them 10-40% for a few days however if your going to not use them for more than 3 days say I would strongly advice charging to about 65%, this is basically just as the 3 LED starts to flash when it’s on charge and simply unplug once it gets to that point. Then simply fully charge once your ready to use. Basically don’t leave them fully charged or discharged for more than a few days. It’s perfectly ok to stop them charging once the 3 LED starts to flash.
Really helpful, thanks for doing this.
Great information once again!
New problems with DJI TB50 / 55 batteries after update.
"When algorithm detects a difference in SOC levels between the algorithm and actual level greater than 5%, RTH (return-to-home) will be activated and automatic landing activated at 10%. If the difference is less than 5% then no action will be activated". SOME ARE LANDING AT 42% UGH!!!
Thanks for your reply cheers
Ty
Thank you for your reply.
very handful informations, I am a new user so it is good to know what am I doing before I am doing it ! Cheers !
Thanks.
Superb ! Thanks for this video.
A very informative and thorough video, well worth saving and referring to from time to time. Thanks very much. Take care and catch you later. Peter
I still think dji could milk 20% out of their batteires by actuly running them down to the cutoff voltage(3v) or leave a little in the tank and stop at 3.2.
They can mitigate the supeise of rapid voltage decrease to the user by deopping the battery percentage sooner.
AKA use an algorithm for the battery percent indicator to make it linear, taking into account the rapid droppoff at the end and extrapolating it over the entire flight time
I store my batteries after use at around 25%., sometimes for long periods because of bad weather etc. You don't deal with this in your quite long video, why?, is it not important? Don't DJI batteries go into a "Hibernation" mode too?
It is important however it would have gone on for ever to put everything is.
For long term storage I strongly advise storing at 65% then check them ever 30-60 days max.
The batteries do enter a long term sleep however it’s not perfect and they will still loose capacity, they should still be checked regularly other wise you don’t want to loose a pack as a result.
@@MadRCThanks for the great video! DJI manual says you should charge stored battery at least each 3 months. By the way will the mavic air battery autodischarge in 10 days (default unchangeable period) if it was not full charged (for example battery had 85% charge)?
The first battery warning has NOTHING to do with return to home, that where you’re wrong, the rest is the also bad advise