Battery light is red when turning off battery

[sakau2007]

I have 7 batteries and for as long as I've had my Phantom, turning them off has been pretty straightforward... you press the button once, then press and hold it for a few seconds and it turns off.

However now on 3 of the batteries, instead of turning off the battery remains on and the indicator light on the battery is solid red. I can then press the button again and it turns off, but I find this odd.

Without going full diagnostic on it, is something wrong with the battery? Are they repairable or should they be trashed? I know at least one of the batteries has been involved in a minor crash and thought that could be the source of it, but did not know exactly what the red light means and if I should continue flying with those batteries.

Thanks.

 

[SamNetwork]

You may need to perform a deep discharge.

 

[sakau2007]

You may need to perform a deep discharge.

Is this where I simply allow the battery to die on its own and then recharge it?

 

[NimpoCub]

Something like that. Drain battery down to about 8-10% (in low hover will be quickest). Do not go to 0 as you will likely toast the batt. THEN do a full charge.

Turning off: Sounds like your first (quick) press is too short. That would cause your batt. to remain on.

 

[Mark The Droner]

Isn't there some kind of hibernation mode on those P3 batteries? You might want to check that out.

 

[Trackman1]

From P3A user manual v1.6 (they should all be same for batterys)
-----------------------------------------------------------------------------------------------------------------
Page 21
How to discharge your Intelligent Flight Battery:

Slow : Place the Intelligent Flight Battery into the Phantom 3 Advanced’s Battery Compartment
and turn it on. Leave it on until there is less than 8% of power left, or until the battery can no
longer be turned on. Launch the DJI GO app to check battery levels.

Rapid : Fly the Phantom 3 Advanced outdoors until there is less than 8% of power left, or until
the battery can no longer be turned on.
--------------------------------------------------------------------------------------------------------------------
I hover mine down to 15 -20%
Bring in. Remove battery and let everything cool for 1/2 hour.
Then take props off. Put on table and leave on until I see 7%.
The next time I might try leaving until it shuts off.

I believe a slower drop will produce a more uniform voltage across the cells.

Some people suggest leaving a fan blowing at the bird for cooling.

 

[Numone]

From P3A user manual v1.6 (they should all be same for batterys)
-----------------------------------------------------------------------------------------------------------------
Page 21
How to discharge your Intelligent Flight Battery:

Slow : Place the Intelligent Flight Battery into the Phantom 3 Advanced’s Battery Compartment
and turn it on. Leave it on until there is less than 8% of power left, or until the battery can no
longer be turned on. Launch the DJI GO app to check battery levels.

Rapid : Fly the Phantom 3 Advanced outdoors until there is less than 8% of power left, or until
the battery can no longer be turned on.
--------------------------------------------------------------------------------------------------------------------
I hover mine down to 15 -20%
Bring in. Remove battery and let everything cool for 1/2 hour.
Then take props off. Put on table and leave on until I see 7%.
The next time I might try leaving until it shuts off.

I believe a slower drop will produce a more uniform voltage across the cells.

Some people suggest leaving a fan blowing at the bird for cooling.

Interesting. You say "
Bring in. Remove battery and let everything cool for 1/2 hour.
Then take props off. Put on table and leave on until I see 7%."
Do I take it you run the motors without the props? If so I presume there's no ill effects of doing that, as it seems like a good idea!?

 

[Multicoptertec]

Could still be writing something to the SD card.


Sent from my iPhone using PhantomPilots mobile app

 

[Trackman1]

Interesting. You say "
Bring in. Remove battery and let everything cool for 1/2 hour.
Then take props off. Put on table and leave on until I see 7%."
Do I take it you run the motors without the props? If so I presume there's no ill effects of doing that, as it seems like a good idea!?

I just did it. Hovered and landed at 11%
Brought in house, took props off. Took battery out to cool for 15 minutes.
Put back in and start p3 and just left alone until 6% as showing on tablet.
All cells were at 3.66v showing green.

Took battery out and put on charger.

I believe lowering the voltage at the end more slowly may be better for the battery.
All cells come down nice and even.

I will not run the motors without props. (without load and air flow)
It may not hurt to do it. But it sure doesn't hurt not to do it.

 

[toegema]

Interesting. You say "
Bring in. Remove battery and let everything cool for 1/2 hour.
Then take props off. Put on table and leave on until I see 7%."
Do I take it you run the motors without the props? If so I presume there's no ill effects of doing that, as it seems like a good idea!?

You should not run the motors at full speed without the props on. The DJI GO app if turned on will quickly give a Message saying the motors are run above normal operation. They might overheat.

 

[Raveneapoe]

Something like that. Drain battery down to about 8-10% (in low hover will be quickest). Do not go to 0 as you will likely toast the batt. THEN do a full charge.

Turning off: Sounds like your first (quick) press is too short. That would cause your batt. to remain on.

If you discharge the battery by hovering, disable RTH! I did this once, *thought* I had RTH disabled and my Phantom P3A entered RTH, flew up and hit a tree limb...Destroying my camera!