Mavic Pro Battery Mod

[mph300]

Getting ready for my first distance run.

 

[lolo780]

You may find putting the batteries forward will help

 

[mph300]

You may find putting the batteries forward will help

I'm making a harness for them so they can eventually be parallel to body and moved forward.

 

[mph300]

I'm just looking to be able to hit 20-25k feet out in my environment, which does have some suck factors, including me. Not shooting for anything beyond that. At least not right away. Best has been 15300 out with successfully rth.

 

[dirtybum]

I'm just looking to be able to hit 20-25k feet out in my environment, which does have some suck factors, including me. Not shooting for anything beyond that. At least not right away. Best has been 15300 out with successfully rth.

Go on, get you some son![emoji41]

 

[CyberNate]

I'm just looking to be able to hit 20-25k feet out in my environment, which does have some suck factors, including me. Not shooting for anything beyond that. At least not right away. Best has been 15300 out with successfully rth.

Those batteries are overkill for that range. You could fly with one on top instead of 2. Dual 3000 is a really good setup. Dual 4000 is a little too heavy unless you have very low wind.

 

[MacIak]

I'm just looking to be able to hit 20-25k feet out in my environment, which does have some suck factors, including me. Not shooting for anything beyond that. At least not right away. Best has been 15300 out with successfully rth.

Good luck!

 

[mph300]

Those batteries are overkill for that range. You could fly with one on top instead of 2. Dual 3000 is a really good setup. Dual 4000 is a little too heavy unless you have very low wind.

I know they are overkill. I'll start with one. I just want to be able to get to destinations and have enough time to fly casual without looking at battery all the time. I'll end up with the smaller ones eventually.

 

[angusc]

This would be a cool product for DJI to produce and support. I am going to hot glue all this into place and hopefully this will be my daily flyer...

View attachment 19598 View attachment 19599

I would like to start some stock battery modifications of my own and like many of you that started out, this would be my first time trying such modifications. Can you share the wiring schematic when connecting multiple batteries to the Mavic controller board showing how to connect the balance leads from multiple batteries please? Also what is the best way to get accurate battery discharge information on the app when having multiple batteries connected.....is it even possible?

Thank you all for any support that you can offer me.

 

[mph300]

I'll start like this and then take off the training wheels..

 

[angusc]

Nice and I spy the Titan down there as well! When are you going for the test flight?

 

[mph300]

Nice and I spy the Titan down there as well! When are you going for the test flight?

As soon as the weather cooperates. Hopefully today.

 

[angusc]

As soon as the weather cooperates. Hopefully today.

Did you do anything with the balance charge leads of the additional battery?

 

[Ciganoboxer]

Guys my pair of miltistar 4000s turned up today from hobbyking ,by accident I must of ordered lipo instead of LiHV [emoji849]
I need one know if I can run these and if so is there any benefits or disadvantages ?!
Someone did tell me these perform better on the second half of 50% ? I’ve included two pictures one is of the weight of the pair etc

 

[CyberNate]

Guys my pair of miltistar 4000s turned up today from hobbyking ,by accident I must of ordered lipo instead of LiHV [emoji849]
I need one know if I can run these and if so is there any benefits or disadvantages ?!
Someone did tell me these perform better on the second half of 50% ? I’ve included two pictures one is of the weight of the pair etc

They work, but have high internal resistance. This means that you won't get all the energy out of them easily. You Mavic battery might show 10% and around 3.6V, but those externals will have something like 3.85V or more. Basically you're only using 65-70% of the external. The LiHV have very low internal resistance and the external usage will track the internal better. I recommend that you get a set of LiHV as well.

 

[MacIak]

Guys my pair of miltistar 4000s turned up today from hobbyking ,by accident I must of ordered lipo instead of LiHV [emoji849]
I need one know if I can run these and if so is there any benefits or disadvantages ?!
Someone did tell me these perform better on the second half of 50% ? I’ve included two pictures one is of the weight of the pair etc

That mistake is easily made, in my opinion they should change label significantly so you can easily spot the difference. I had them in my cart as well but realized that before I hit "pay now". I noticed flying with turnigy double 1800 pays off and they run lower end voltages but generally heavy LiPo's is carrying lots of dead weight unless you can, and mavic allows, running the main really low.
Weightwise you should be good unless you add another 100g of stuff. Id just strap 1 to see how the consumption behaves.

 

[mph300]

I just did a very conservative test flight with the same multi star 4000 except mine is lihv. It was piggy back with the maxx uav connector. Was recording with all sensors on. Flying full throttle in p mode. Flight data link:
Airdata UAV - Flight Data Analysis for Drones

Is there a formula for approximate further distance that could have flown based upon battery start, turnaround and end voltages?

It also appeared that rth line would have been accurate if I took it out further. I thought rth line was not usable with an additional battery. By my fuzzy math on percentages indicated I could have went about 7000 feet further and still made it back ok.

Any thoughts appreciated.
Mike

 

[CyberNate]

I just did a very conservative test flight with the same multi star 4000 except mine is lihv. It was piggy back with the maxx uav connector. Was recording with all sensors on. Flying full throttle in p mode. Flight data link:
Airdata UAV - Flight Data Analysis for Drones

Is there a formula for approximate further distance that could have flown based upon battery start, turnaround and end voltages?

It also appeared that rth line would have been accurate if I took it out further. I thought rth line was not usable with an additional battery. By my fuzzy math on percentages indicated I could have went about 7000 feet further and still made it back ok.

Any thoughts appreciated.
Mike

You are flying way too slow. Turn off obstacle avoidance for 31 mph in p mode.

 

[mph300]

You are flying way too slow. Turn off obstacle avoidance for 31 mph in p mode.

Hence, the very conservative part. I've read all about it. I just take small steps and learn.

 

[MacIak]

Hence, the very conservative part. I've read all about it. I just take small steps and learn.

Just make sure you takeoff and fly headwind on the way out, drain battery to 55% (still very safe) and then fly back. Unless the mavic bricks in flight id say that would be a good start, no need to crunch numbers.
By field test: you should be able to do 30.000' on a 4000lihv and still juice left