Mavic Pro Battery Mod

[CyberNate]

Test a 3600 mAh battery. Flew 480 ft POI At 240 feet, 20 mph for 34 minutes landed at 2%. The DJI Battery was off at time of landing. May attempt a long distance flight with two with these batteries in the future.

That is really good! Never saw these batteries before. The power density is higher than the multistar lihv 4000 batteries. May have to get a couple.

What was the voltage on externals after flight?

 

[TheLightSpeed!]

100c is really high rate right?

 

[lolo780]

Test a 3600 mAh battery. Flew 480 ft POI At 240 feet, 20 mph for 34 minutes landed at 2%. The DJI Battery was off at time of landing. May attempt a long distance flight with two with these batteries in the future.

Could you post up the voltage discharge curve for that flight?

 

[lolo780]

100c is really high rate right?

100C is very high.
Review – ProTek 7.4v 2S 100C 7000 mah Lipo Battery

 

[chazz]

Test a 3600 mAh battery. Flew 480 ft POI At 240 feet, 20 mph for 34 minutes landed at 2%. The DJI Battery was off at time of landing. May attempt a long distance flight with two with these batteries in the future.

The DJI battery was off did it go into autoland?

 

[SkyNinja]

That is really good! Never saw these batteries before. The power density is higher than the multistar lihv 4000 batteries. May have to get a couple.

What was the voltage on externals after flight?

This is what battery readed on my charger after the flight

 

[SkyNinja]

Could you post up the voltage discharge curve for that flight?

I’m not sure exactly how to do it. Can I find that information in Airdate/Healthy drone?

Airdata UAV - Flight Data Analysis for Drones

 

[lolo780]

DJI battery plus TP4500HV. After sitting, the TP pack showed 3.79 3.80 3.79. DJI battery was off on landing.

 

[CyberNate]

This is what battery readed on my charger after the flight

That is very good! Shows low internal resistance. I'm surprised the cells went that low. This means you're getting all the energy from those external cells.

 

[CyberNate]

This is what battery readed on my charger after the flight

Did you charge them to 4.35v or 4.20? These are LiHV so you should charge them to the higher voltage.

 

[SkyNinja]

The DJI battery was off did it go into autoland?

I was in RTH so I’m not sure, I had full control of the bird the whole time though and was able to control the landing. I received a critical voltage warning at 3%.

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@CyberNate, yes charged to 4.3 5V. Battery meter showed all three cells that 4.34v when they came off of charge.

bought these batteries a while ago, but they don’t have too much wear on them. They were originally purchased to use on one of my RC trucks I converted from nitro to electric/brushless. That the reason for the high discharge rate.

 

[digdat0]

SkyNinja -you dont have the battery set to non-dji do ya?

I modded my new Mavic, recorded it and tried to put together a how-to for some newer folks who wanna get into this. You guys can't bust my balls on the soldering too hard when i post it

glad to see dirtybum is flying again, some great talks about batteries. I got a pair of zippy 2200 lipo's and then a pair of bolt lihv 2400 batteries. Need the rain to stop and i can do some testing! Looking for 30 min+ and I'll be happy.

 

[lolo780]

DJI battery plus TP4500HV and TP3500HV, hover only, 20c air temps, 1210g AUW. It wanted to land just before 40min, but I kept it in the air a little longer.

 

[TheLightSpeed!]

I was in RTH so I’m not sure, I had full control of the bird the whole time though and was able to control the landing. I received a critical voltage warning at 3%.

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@CyberNate, yes charged to 4.3 5V. Battery meter showed all three cells that 4.34v when they came off of charge.

bought these batteries a while ago, but they don’t have too much wear on them. They were originally purchased to use on one of my RC trucks I converted from nitro to electric/brushless. That the reason for the high discharge rate.

Yep that's autoland. Looks like it? My bird refuses it, and I have no idea why.

 

[lolo780]

I’m not sure exactly how to do it. Can I find that information in Airdate/Healthy drone?

Airdata UAV - Flight Data Analysis for Drones

Go to Assistant, select Flight Data, open the SD card and download the relevant file to your computer.

 

[mavicpro1000]

So does holding in 'upstick' whist autoland is kicking in, count towards duration?

 

[SkyNinja]

@digdat0, I have it set to non-DJI battery and LED warning only

@Lightspeed, both of my critical landing perimeters speeds are set to 0. The bird will say critical landing but doesn’t land.

@lolo780, ok i’ll go in to assistant and see if I can find the discharge rate after the DJI battery shut off.

 

[TheLightSpeed!]

So does holding in 'upstick' whist autoland is kicking in, count towards duration?

Yes! But we're not measuring duration, we're measuring length or distance.

 

[TheLightSpeed!]

@digdat0, I have it set to non-DJI battery and LED warning only

@Lightspeed, both of my critical landing perimeters speeds are set to 0. The bird will say critical landing but doesn’t land.

@lolo780, ok i’ll go in to assistant and see if I can find the discharge rate after the DJI battery shut off.

Ah, I see. Well that's good!

 

[dirtybum]

These proteck graphenes look promising! who cares what the c rating is as long as it doesnt increase the weight too much, and these are really lightweight. The low resistance is a boast from the company and also looks promising. Thanks ninja!