I was following clips on laptop battery recovery and got linked to this. Thank you Philip John for doing the research to make this the polished delivery it was. You deserve far more likes and subscribers.
Brilliant method! Saved me hundreds of $. Charging at 4.5V, firstly at 30mA, then 100mA, lastly 200mA untill each battery cell is holding at ～4.2V. I used 5 wires as interfaces between battery and drone when powering up. Battery unlocked when firmware updated. Thanks so much!
Thank you very much for this video. I had 2 dead batteries and I managed to restore one of them using your method. It now starts up, the LED's flash and it flies the drone OK. The other battery I think maybe I damaged it trying to charge the cells or while I was soldering wires to the pins I used to connect to the battery while it was out of the drone. It holds charge and I can charge it with the charger, but the LED's won't come on and the drone says battery not connected properly so it won't take off. Still one spare battery is much better than none!. Thanks again for taking the time to do this, I'm sure it will help many other victims of DJI's built-in obsolescence!.
Great video obviously from someone, who knows, what they are doing. As a user of multiple drones (and Batteries), this Video instantly goes into my To-Do Folder, for as and when I may need it. It is good practice, to oversee all of these batteries at least once a few months, as ALL DJI batteries have a feature to "discharge" themselves, once the user does not use a fully charged battery as soon as it is charged. This "discharge" starting point can be set to a certain day after the battery has been fully charged. The Self Discharge will discharge these batteries to some 60% of their full charge capacity within about 6 days of a Full Charge (settable in the DJI Go4 App). Keeping these batteries charged at around the 50-60% mark, when in storage, actually vastly prolongs their service life.
Thanks for this - recovered one battery using these instructions as the firmware updated the battery when connected to the drone. 2nd battery, although getting it fully charged, wouldn't update the firmware so had to use the CP2112 method - which then worked fine. 3rd battery has a totally dead cell so waiting for a replacement cell to try a full cell replacement!
14:52 mark..just solder wire to top of "1000' block (top right of +ve batt terminal)...solder another wire across bottom left 2 +ve contacts , remove power knob from batt case, feed both wires through hole, reassemble and fit batt into drone , twist/touch wires till drone starts .... saves a LOT of work :)
Thank you very much. Actually only 4 wires are needed + / - and battery communication interface. You can bypass the internal switch directly in the battery by connecting the + batery to the output terminal. I used small hooks to connect to dron connector and oposite side I have soldered to the battery connector directly.
hi great video, I have 2 of these batteries that refuse to charge from the DJI power brick, both are basically new but stored for a long time, would you be interested in having a go at getting a charge into them? (not something I'm confidant to try myself) Drone firmware is newer than the batteries so the firmware update I could do myself
Great video, but I really don't see how could you open the battery without completely ruining it. Could you please make a video showing how to open the battery without destroying it? Thanks!!
buen video, necesito tu ayuda de de ser posible, compre un ev2300 para baterias dji mavic 2 pro, y no puedo usarlo, ubrt sin licencia??? hay otro programa que pueda usar, saludos
Hi Philip. Great work! Here is my question: my batterys have had bad used by the first owner (im second). Now one of those batterys just died, and I wanna know if i can recover it, it is about 50 charging cycles, I have a cp2112. The first step I have done yet is to open the battery and cheked the voltage, each cell have 4.25 v 🤔 it is "full" and balanced, but the last flight it have had just wento from 90% to 0% and the mavic air just fell down, online but with motors at very slow speed and turned off. Im thinking about the capacity of cells for maintain current and voltage constant. So, do you have had some of that behavior? is the cp2112 useful along with battery killer software? thanks for your videos.
Such an amazing video. Thanks so much for this. I have a question, My battery has stopped at 11.3 v and I tried charging it several times for around 5 minutes but seems it's not charging. Is it damaged or do you have any idea on this? But I charged it from 2.9v to 11.3v thanks to you!!. If you can give a help, thanks so much!! Also I was using laptop charger. But it didn't get heat I was monitoring.
Hello and regard!, i do all steps like you and rone is turn on but when i want to update firmware it is say Battery is 50% need charge it its have about 12,75 volts when i measure, any tips you know mate??
done this just as you say but i get battery needs to be over 50% charged in dji assitant when its bypassed and fully charged also i remove the bypass wire and it shuts down any one any ideas
I did bypassed + from the top of 1000 resistor to 4 + pins, and reassembled the battery, drone starts but has no battery communication. My battery became unresponsive after a crash, so maybe it suffered a physical damage
Great tutorial, but it's not working here. I used a hobby battery charger to charge the battery (skyRC b6) and was succefully charged it. I connected the battery to the drone but it always says that the battery is 0% charged, no matter if I fully charged it and it avoids me to refresh the firmware. So I tried to connect the battery directly to the drone (with the case open) to check if it was a communication problem and I had a surprise when the drone powered up immediately after the battery connection with no battery button pressed (which is still dead). I think that I'm burned the electronics. I have another dead battery and I don't know if I try the same method. Any idea?
Unfortunately I have not been able to make this work for me. Manually charged the battery, made up a wire harness, got the drone to boot. But when it goes to update it fails and says the battery needs to be above 50%....fine...so I charged it all the way, same error...Tried to update via the app. The main display of the app indicates 0% battery despite showing over 4.2V/cell. So until I get that sorted out...
This is a great video but I do not have the expertise or equipment to do this. Would you be interested in providing a service where I can send my battery to you and pay you to do this for me? Of course, I understand that there are no guarantees that it will work, but I'm happy to take the gamble if you would consider this. Thanks.
have tried using an interface and it will not read the battery and have also tried firmware update but it gets to 76% and stops which is where it would update the battery so i give up, i have managed to get plenty of charge into the battery so its not that. bin job me thinks lol
hi Sir, it is a excellent video. i found this method works only if the battery software is old. So the recovery is automatically due to updation of battery, if our battery is new , the update does not work. is this true
If the battery software is older than the camera software (it was in my case) then it will ask you if you want to update the software and this resets the battery. If this is not the case the firmware refresh (see video at 17:40) might do the same thing, but I am not sure. There may also be other ways to force a reset on the drone and battery firmware.
Hi John, thanks for your video. i'm too an owner of Mavic Air one and I'm in the same situation but, my cells are very used and not relaiable for additionals flights, so i decided to replace the lipo cells inside the battery case buying the new three. I'm still waiting for the new cells from Aliexpress, but in the meanwhile i collect more possible information to repair all my three batteries (nine cells in total) . So my question is: do you retain possible follow yours procedure to recover the battery after replace the cells? thanks for your help. Germano
Hi everyone, some info userful for all: I have opened the battery, recharged all cells in series looking for voltage balance, then made a short directly on the battery installed on Mavic without plastic case, so I have avoided all the connections. After boot battery remains connected by itself but leds are off. I have restored 2 batteries, one with a Sw update request at transmitter connection, The other without any request for update, has been restored with forcing a firmware update (even version was the last) by DJI assistent
@@hnhl.1910 install dji assistant and update firmware even yet updated. This process will require about 10 minutes, download from web, download to mavic and a reboot while updating, your leds will turn on
OMG seriously?!? :)) So many and complicated things to do!! I prefere to buy new one instead ;) To do that you have to be quite poor or just very stingy :)) Plus you need to have all of those things or to BUY them... and with those money you buy new battery. Just saying
When I did this work new batteries were not available anywhere, perhaps they are now? In any case I had all the equipment so it cost me nothing but a little time, each to their own.
