Mavic2 Battery Mods

[beanbubba]

That’s funny, I got the battery connection pop up today due to power up with the external battery to check the settings prior to my flight.[emoji106]

Ohhhh, I learned a lesson today too that needs to be noted. If you get the battery error at takeoff, one of the culprits is that your external's started charging the factory battery. Take a quick glance at the factory battery LEDs and they will be flashing if this is the case.

This happened today (and never before) because I had heated up my externals with toe warmers but did not heat up the factory battery (it was at room temperature).

 

[beanbubba]

That’s funny, I got the battery connection pop up today due to power up with the external battery to check the settings prior to my flight.

It was 30° this morning when I did my flight, I could’ve used a one of those heat packs home my battery[emoji106]

Can't beat these for the price:

https://www.amazon.com/dp/B06ZYW6HDK/

 

[beanbubba]

Here's a closeup of the battery controller mod if you want to try it. Jut carefully extricate this section of the factory battery intact. Then cut the factory balance cable and solder up to a standard 4S jumper cable. My only recommendation is take your time. It is a physical experience tearing down a DJI battery

 

[mlash]

So I done a test flight today with my MS 5.2 LiHV and it went well. I just did a back-and-forth with full stops on each turn (about 30 turnarounds) to put a little more pressure on the flight. No auto_landing so I think this will be my first long distance flight battery.

 

[beanbubba]

So I done a test flight today with my MS 5.2 LiHV and it went well. I just did a back-and-forth with full stops on each turn (about 30 turnarounds) to put a little more pressure on the flight. No auto_landing so I think this will be my first long distance flight battery.

View attachment 53752
View attachment 53754

What's your verdict? Does forward flight quash the heavy auto land?

 

[mlash]

What's your verdict? Does forward flight quash the heavy auto land?

I really hope that it does but I can't say for sure yet! I feel that my results were really positive and it makes me more confident to try a long range test. I will feel a lot better about it when I run this battery out and make it back.

 

[beanbubba]

I really hope that it does but I can't say for sure yet! I feel that my results were really positive and it makes me more confident to try a long range test. I will feel a lot better about it when I run this battery out and make it back.

Your course looks to be all open desert. If you come up a couple thousand feet short, it's just a short hike to get it, right?? Good luck!

 

[beanbubba]

**** DJI.View attachment 53656

I am slow and just got the joke heheeheehee

 

[mlash]

I am slow and just got the joke heheeheehee

LOL!

 

[beanbubba]

I just did a heavy hover test with dual TP4400LiHV and NO factory battery with AUW 1341 grams. Flight was 43 minutes and airdata link down below.

I have positivley narrowed the heavy auto land issue to the following 3 variables (in my situation). I do not yet know which or all of the 3 variables are the culprit and will continue testing.


NO HEAVY AUTO LAND
AC version 00.06.0000
Removal of factory battery
enable_new_smart_battery = 0

HEAVY AUTO LAND
AC version 01.00.0100
Factory battery used
enable_new_smart_battery = 1

Not many notifications during the flight, but this is the final set of errors as the bird ran out of juice sub 3.5 volts.



This is a pretty good power to weight ratio for general flying @ 1341 grams and 8800 mAh:

 

[SkyNinja]

I just did a heavy hover test with dual TP4400LiHV and NO factory battery with AUW 1341 grams. Flight was 43 minutes and airdata link down below.

I have positivley narrowed the heavy auto land issue to the following 3 variables (in my situation). I do not yet know which or all of the 3 variables are the culprit and will continue testing.


NO HEAVY AUTO LAND
AC version 00.06.0000
Removal of factory battery
enable_new_smart_battery = 0

HEAVY AUTO LAND
AC version 01.00.0100
Factory battery used
enable_new_smart_battery = 1

Not many notifications during the flight, but this is the final set of errors as the bird ran out of juice sub 3.5 volts.


View attachment 53819

This is a pretty good power to weight ratio for general flying @ 1341 grams and 8800 mAh:

View attachment 53820

Great work! When you have some time could you please do a test hover with a AUW of around 1585g? This is weight of a M2 with 2 MS4000.

 

[beanbubba]

Great work! When you have some time could you please do a test hover with a AUW of around 1585g? This is weight of a M2 with 2 MS4000.

I did an error free flight tonight at AUW 1477 grams:

Official Mavic 2 Range Leaderboard

I think we may be back in business in regards to the heavy auto land issue...

 

[Wizard1]

I just did a heavy hover test with dual TP4400LiHV and NO factory battery with AUW 1341 grams. Flight was 43 minutes and airdata link down below.

I have positivley narrowed the heavy auto land issue to the following 3 variables (in my situation). I do not yet know which or all of the 3 variables are the culprit and will continue testing.


NO HEAVY AUTO LAND
AC version 00.06.0000
Removal of factory battery
enable_new_smart_battery = 0

HEAVY AUTO LAND
AC version 01.00.0100
Factory battery used
enable_new_smart_battery = 1

Not many notifications during the flight, but this is the final set of errors as the bird ran out of juice sub 3.5 volts.

View attachment 53819

This is a pretty good power to weight ratio for general flying @ 1341 grams and 8800 mAh:

View attachment 53820

I can see that the battery is mounted length wise on the bottom. Will it fit width wise in the battery compartment (above)?

 

[beanbubba]

I can see that the battery is mounted length wise on the bottom. Will it fit width wise in the battery compartment (above)?

Yes it will fit, but I hastily over wrapped it with insulation too much and I didn't want to re-wrap it in the field.

 

[beanbubba]

Great work! When you have some time could you please do a test hover with a AUW of around 1585g? This is weight of a M2 with 2 MS4000.

I tired this config with +2 TP 4400's and +1 factory cell with AUW @ 1585. I tried to take off but got an inch off the ground and it powered off (new behavior). I tried this 3 time and same result, then removed the factory cell and she took right off and did a full flight @ AUW 1340.

 

[beanbubba]

OK, I have a new theory that I can replicate now for heavy auto land.

I have no idea technically why this would matter, but I observed what I observed.

When I run multiple batteries, if they are all the same mAh rating and all fully charged, I have not seen the heavy auto land issue. When I run multiple batteries and they are mixed mAh (and fully charged), I get the heavy auto land almost every time.

Any electrical engineers out there that might have a theory why this would happen?

 

[SkyNinja]

I tired this config with +2 TP 4400's and +1 factory cell with AUW @ 1585. I tried to take off but got an inch off the ground and it powered off (new behavior). I tried this 3 time and same result, then removed the factory cell and she took right off and did a full flight @ AUW 1340.

View attachment 53898

what’s next!![emoji30]

 

[mlash]

My 2 MS4000 setup weight is about AUW 1585g and my single HobbyStar setup weight is 1489g.

Hey SkyNinja I think I'm going to give the Hobbystar battery a shot. Is this the battery you flew out to 58,732ft and back with no problems? I know it's expensive but if it's 100g lighter it would be worth it to me!

 

[SkyNinja]

Hey SkyNinja I think I'm going to give the Hobbystar battery a shot. Is this the battery you flew out to 58,732ft and back with no problems? I know it's expensive but if it's 100g lighter it would be worth it to me!

Yes it’s the one I was using on that flight. It comes in a hard case that you will have to remove.

 

[beanbubba]

Hey SkyNinja I think I'm going to give the Hobbystar battery a shot. Is this the battery you flew out to 58,732ft and back with no problems? I know it's expensive but if it's 100g lighter it would be worth it to me!

See the link of where you buy it please.