Battery mod thread

[Justinswidebody]

Awesome thread!!

Does anyone know of a reliable, turnkey solution for adding ~10 mins of flight time to their MM? Thanks.

DJI Mavic mini - DJI Mavic 2 mods Mavic Mini battery mods and spark battery mod adaptor

www.uavmods.co.uk

 

[bibibana]

How about replacing with batt type 26650, lesser weight but higher capacity.

 

[Justinswidebody]

How about replacing with batt type 26650, lesser weight but higher capacity.

You can try whatever type of batteries you want in a 2s configuration. Your main concern is weight...

 

[Tyson76]

How long is the factory battery life (charge number)?

 

[bibibana]

You can try whatever type of batteries you want in a 2s configuration. Your main concern is weight...

And Drain Capacity too. Should be on 20A or more.

 

[Skiiingwonderz]

DJI Mavic mini - DJI Mavic 2 mods Mavic Mini battery mods and spark battery mod adaptor

www.uavmods.co.uk

Thanks, I did see that a couple days ago and sent a request to be added to the FB group.

When you add an external battery is the remaining battery percentage displayed on the Fly app no longer accurate?

 

[Justinswidebody]

Thanks, I did see that a couple days ago and sent a request to be added to the FB group.

When you add an external battery is the remaining battery percentage displayed on the Fly app no longer accurate?

If you add an external and keep the factory battery in the battery bay it will still show the correct telemetry. If you remove the inside battery and only fly on externals then the percentage reading will become inaccurate and you will have to fly off the voltage telemetry

 

[everBit]

If you add an external and keep the factory battery in the battery bay it will still show the correct telemetry

Do you have a video or screenshots proving that? Have looked one on your channel with modded battery and there is no indication of Charge percentage as it's covered by cells telemetry subwindow throughout all the flight.
Could you please make periodical taps on main screen in your next videos to show charge % and remaining flight time indicator, it would be very useful information to assess the mod. Thanks!

Correct (%) calculation especially important at the end of the flight, it should properly correlate with cells voltages to not have unexpected landings etc.

 

[Justinswidebody]

Do you have a video or screenshots proving that? Have looked one on your channel with modded battery and there is no indication of Charge percentage as it's covered by cells telemetry subwindow throughout all the flight.
Could you please make periodical taps on main screen in your next videos to show charge % and remaining flight time indicator, it would be very useful information to assess the mod. Thanks!

Correct (%) calculation especially important at the end of the flight, it should properly correlate with cells voltages to not have unexpected landings etc.

I fly off the voltage. I have the mini set to non dji battery mode. Otherwise it would be landing when it still has over 80% battery left but it calculating it has 0%. Next time I do a video I will show you that I fly for another 40min after the battery shows I'm at 0% .

 

[everBit]

So the answer to

When you add an external battery is the remaining battery percentage displayed on the Fly app no longer accurate?

is Yes, with modded battery percentage is no longer accurate. Correct?

It's expected that with increased total battery capacity calculated SoC (%) should have big enough error as controller is preprogrammed with 2500mAh and SoC normally derived based on internal coloumb-counter measurements. So the more extra capacity the more error.

Just a bit confused when you answered

If you add an external and keep the factory battery in the battery bay it will still show the correct telemetry

 

[Justinswidebody]

So the answer to



is Yes, with modded battery percentage is no longer accurate. Correct?

It's expected that with increased total battery capacity calculated SoC (%) should have big enough error as controller is preprogrammed with 2500mAh and SoC normally derived based on internal coloumb-counter measurements. So the more extra capacity the more error.

Just a bit confused when you answered

Because by keeping the factory battery in the battery bay, that battery is still only going to put out 2500mah. The bms (battery monitoring system) only sees that battery. The mini is still using the other battery but the battery inside doesn't discharge as fast but still discharges 2500mah. That's why it still reads fine with a stock battery in the mini.

Without factory battery, but still using the factory batteries BMS it will never display the correct % because it thinks it still has a 2500mah battery attached to it. It can measure when that 2500mah has been discharged which is why it will display 0% in around 15 min...

 

[asdjiu011]

Hey, I have logical analyser at home, I will try to analyse the data communication between the battery and the drone and think if it could be replicated with custom chip.

Is it ev2300? How is it going?

 

[asdjiu011]

We are up to 53 min! Getting closer to the 1 hour mark! I did this using one dji spark battery and one mavic pro battery.

Can you share your experience and technology of battery replacement recently

 

[Justinswidebody]

 

[asdjiu011]

That's great. Today, I adjusted the parameters of the mini. The flight speed can reach 14.8, and it can be faster. It would be a very good experience if equipped with this battery.!

 

[Craig Notts]

Hi Justin
Have you or would you you consider doing a YouTube clip of how you did your battery mod

 

[Justinswidebody]

Hi Justin
Have you or would you you consider doing a YouTube clip of how you did your battery mod

You mean the magic board?

 

[Marcuchinonis]

You mean the magic board?

That should be “the clip”

 

[Marcuchinonis]

You mean the magic board?

Are your marvellous custom magic board still alive after 60min fly time?

 

[Justinswidebody]

Are your marvellous custom magic board still alive after 60min fly time?

Yes they're are staying alive so far