Mavic2 Battery Mods

[beanbubba]

What was the battery temp? I just had this happen on an M1 with a cold battery. Flying forward and up draws the most current.

Batteries just got off the heating pad and it was 65F outside.

 

[lolo780]

Batteries just got off the heating pad and it was 65F outside.

**** DJI.

 

[SkyNinja]

This is quite strange, I flying at 1489g

 

[beanbubba]

**** DJI.View attachment 53656

What's this??

 

[beanbubba]

This is quite strange, I flying at 1489g


View attachment 53657

Hang onto that M2, you have a special one.

 

[mlash]

Mark, what is the weight of the MS 5200? 1445 AUW (makes the battery about 525g). Seems a little bit high for a 5200mAh battery. I believe Bean’s Protek 5600 weigh 455g and 2 MS4000 weigh 668g.

Oops! My Bad, it is 1345 AUW. Thanks for catching that, I was operating on 4 hours of sleep the last two days. I thought that seemed a little heavy but it's what I was seeing on the scale!

 

[SkyNinja]

Hang onto that M2, you have a special one.

I guess Nate and Pablo must have special ones to. Both of them have flown long distances at AUW 1580g[emoji848]

 

[lolo780]

Aggressive flying in manual mode can trigger auto landing on a stock M2.

Try min/max on all the battery parameters and see what changes.

 

[mlash]

This is quite strange, I flying at 1489g


View attachment 53657

Eventually it might worth it to try the hobbystar out! I just did a hover test and it was 4 minutes before the autoland kicked in!

 

[mlash]

@Pablo Chacon how did you disable the upward vision sensor that the clip is covering up? When I disable the vision system in the Go4 app, all the other sensor disable except the upward on my bird.

After the 3rd attempt practicing and switching to 0.016 brass, I think I got this figured out. Gonna dunk this in some clear epoxy now...

BTW - You think the UAVMODs guys are over charging, but until you do this yourself, their prices seem very reasonable to me now

If they sold XT30 versions, I would have bought from them if doing this over.

View attachment 53580

View attachment 53581

Did you ever figure out how to turn off the top IR Sensor? I notice my top sensor is still active as well, even though I have all sensors turned off. The bottom IR sensor is not active, just the top!

 

[beanbubba]

Did you ever figure out how to turn off the top IR Sensor? I notice my top sensor is still active as well, even though I have all sensors turned off. The bottom IR sensor is not active, just the top!

Sport mode.

 

[SkyNinja]

I did a test flight with a single protek 4200. It was Cold 30°F so l only flow the battery to 65% 38,900’ and returned home landing with 31%.

I think this battery is going to be good for about 47,000 ft.

@beanbubble I think a single protek 5600 will work 50k.

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[beanbubba]

Anyone know what this M2 parameter does exactly? I am grasping for straws on the heavy auto landing issue.

{
"DEFAULT": 1,
"MAX": 1,
"MIN": 0,
"NAME": "enable_new_smart_battery",
"RAW_NAME": "enable_new_smart_battery",
"TYPE": "uint8_t",
"VALUE": "1"
}

 

[beanbubba]

Made some progress today.

Ran this config today with no factory battery and 2x TP4400 LiHv. I took straight off and up and ran my standard test course. ZERO errors and excellent handling in sustained 15 mph winds. And specifically NO heavy auto landing.

I learned a new M2 thang today worth noting. I was flying low over water into heavy wind and the bird has to aggressively tilt into the wind so much that it triggered the front sensors had an obstruction. I was about 15 foot above the water at full speed and the incident dropped the bird nearly into the drink. Lesson learned to stay in sport mode in these conditions.



I used 2x toe warmer packs per TP4400 and it was 40F here today. They were toasty warm/hot at takeoff and room temperature at landing. Not having a factory battery, I noticed the fan was not running at landing (the lack of sound was foreign and disturbing). I have a theory that this particular fact has a big impact on heavy flights by keeping the ESC cooler than when the factory battery is in place. I am hooked on these disposable toe warmers, you can tape them up in the morning and they are good/hot for 8 hours until you are ready to fly. In bulk, it will cost you about a dollar per flight.

PS - I used the enable_new_smart_battery=0, but don't know if it did anything. I need to do a hover test in this config and see if any heavy auto landing kicks in with and without the new parm change. I don't think I will fly again with the factory battery except for stock runs.

 

[SkyNinja]

Made some progress today.

Ran this config today with no factory battery and 2x TP4400 LiHv. I took straight off and up and ran my standard test course. ZERO errors and excellent handling in sustained 15 mph winds. And specifically NO heavy auto landing.

I learned a new M2 thang today worth noting. I was flying low over water into heavy wind and the bird has to aggressively tilt into the wind so much that it triggered the front sensors had an obstruction. I was about 15 foot above the water at full speed and the incident dropped the bird nearly into the drink. Lesson learned to stay in sport mode in these conditions.

View attachment 53743

I used 2x toe warmer packs per TP4400 and it was 40F here today. They were toasty warm/hot at takeoff and room temperature at landing. Not having a factory battery, I noticed the fan was not running at landing (the lack of sound was foreign and disturbing). I have a theory that this particular fact has a big impact on heavy flights by keeping the ESC cooler than when the factory battery is in place. I am hooked on these disposable toe warmers, you can tape them up in the morning and they are good/hot for 8 hours until you are ready to fly. In bulk, it will cost you about a dollar per flight.

PS - I used the enable_new_smart_battery=0, but don't know if it did anything. I need to do a hover test in this config and see if any heavy auto landing kicks in with and without the new parm change. I don't think I will fly again with the factory battery except for stock runs.

View attachment 53742

Bean, can you post up the factory parms next to the ones you changed.

 

[beanbubba]

Here is my latest power setup. This is cool because you do not have to touch a hair on your M2, just procure a battery clip and sacrifice one factory battery. ZERO mods needed on the bird itself for those that get squeamish cracking open the bird shell.

 

[SkyNinja]

Here is my latest power setup. This is cool because you do not have to touch a hair on your M2, just procure a battery clip and sacrifice one factory battery. ZERO mods needed on the bird itself for those that get squeamish cracking open the bird shell.

View attachment 53744

Beanbubba, using the battery lead are you getting battery percentage and voltage in the Go 4 app?

 

[beanbubba]

Bean, can you post up the factory parms next to the ones you changed.

If you use the above parameter mod's, then you attach one of your external battery balance cable straight to the battery controller and you get 4S voltage readouts. The battery percentage does not work and you have to fly knowing your voltages. And no more annoying beeping during low battery or any type of auto landing.

BUT beware, the bird will fly with no indications of low power to the point it will drop from the sky. So know what you are doing if you enable these mod's.

EDIT: right at takeoff you get a pop up that you have to acknowledge. It says "there does not appear to be a battery connected, fly with caution".

 

[beanbubba]

A tiny drill hole in the shell with a nut and bolt, and you can firmly attach this mod without the trailer trash tape method

 

[SkyNinja]

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]