Hello all.O have a P4S  with 1 battery.

Battery health says 100%, but with the battery powered on in the drone it takes about 2 minutes until the drone receives power and starts up.

what would cause this? is that a bad battery circuit board or is something going out inside the drone?

maybe a video will help show what my battery is doing.

maybe a video will help show what my battery is doing.   

Tim1985 Posted at 10-8 16:10
maybe a video will help show what my battery is doing.   https://www.youtube.com/watch?v=piL7YtiexLM

I suspect that the aircraft is initialising various systems and that is causing the delay in powering up. Actually, it has powered up, but not yet got to initialising the camera and gimbal, and that makes you think is is not starting up. You might check the SD card, as sometimes it spends a lot of time setting up and checking the card. It would be a good idea to copy off any files you need on the card and then format it in the aircraft using the DJI Go app.

you  need test another battery  i think this problem in battery

Whatever .........  please post the solution when you get there ?

I will have to find another battery online and give that a try.  

I don't think it's the SD card. Have tried 3 different ones and even without a SD card.

If it does turn out being the circuit board intelligent part of the battery. Would anyone know why or what the process of the board is. Meaning how does to determain when to send power and when to stop sending power and if there is a hard reset to the board.  


Thanks all.  

Tim1985 Posted at 10-9 03:42
I will have to find another battery online and give that a try.  

I don't think it's the SD card. Have tried 3 different ones and even without a SD card.

The battery looks fine, and it will not be a problem with the battery circuitry. Try putting the SD card that came with the aircraft in.

Tried 2 different SD Cards. No difference.  Have not tried a new battery yet.

Anyone know what powers up first after the battery it turned on? Battery , internal power module board that connect to both esc and power cable plus ribbon cable to 3in1 and Flight controller?


I just did a 20 minute flight without any problems except the 5 minute wait for power up.

Ok, surprise visit from a friend who had a P4 battery. it's not the battery causing delay power up. Tested bot in the P4S and also used Voltmeter to test. both batteries output power as soon as power was turned on. So now that leads to something inside the P4S is not receiving power until it "warms up".

During power on, is it showing any errors on screen? it could be there is an error during startup

Bashy Posted at 10-9 17:10
During power on, is it showing any errors on screen? it could be there is an error during startup

No errors. no life to entire drone until at least 2 minutes has passed after the battery has been inserted and on.


Almost like the entire system requires a warm up phase before anything comes alive.

It's more annoying then anything. The drone flies perfect , just want it to to come on when the power button is pressed instead of waiting almost 2 minutes then have to wait after power up for gps lock and everything else..

All you need to do is re-calibrate the IMU. Make sure that the battery is cool, maybe a little refrigerator time or out side in the cool night air. Put the battery in your drone and do the calibration right away. That causes it to start up faster so you can fly sooner. As the weather cools it takes longer for things to warm up to the temperature of when it was first calibrated. So, calibrate it at a lower temperature.

Goldenseal Posted at 10-9 18:21
All you need to do is re-calibrate the IMU. Make sure that the battery is cool, maybe a little refrigerator time or out side in the cool night air. Put the battery in your drone and do the calibration right away. That causes it to start up faster so you can fly sooner. As the weather cools it takes longer for things to warm up to the temperature of when it was first calibrated. So, calibrate it at a lower temperature.

Below 30C? Last calibration according to the .DAT file pulled from the P4S internal memory card was done at 30c temp.

Tim1985 Posted at 10-9 18:31
Below 30C? Last calibration according to the .DAT file pulled from the P4S internal memory card was done at 30c temp.

I would say there is a faulty board (power supply) inside the aircraft and eventually you may have an unintended landing. I would stop flying the AC while still have one and send it in for repair.

Internal Power Module that connect battery to esc's?

Wished a Mod would confirm the power to procedure.

Battery communicates with internal power module. Power Module gives the ok and sends power to the 3 in 1 and Flight controller and gimbal.


Am I correct or is this wrong?

The craft is way out of date for repair by DJI. would cost to much to repair by them.

Tim1985 Posted at 10-10 07:59
Internal Power Module that connect battery to esc's?

Wished a Mod would confirm the power to procedure.

You won't get a moderator to give any other advice other than to send it to DJI for repair, they are not technical people. There is no delay in sending power anywhere, nor does anything need to 'warm up'. The entire aircraft will receive power as soon as you switch on the battery, but various systems inside the aircraft need to be initialised, and this is done sequentially. So the answer will be that one system is not responding, and the initialisation process is waiting for it, that's where your delay is coming from.

Geebax Posted at 10-10 12:53
You won't get a moderator to give any other advice other than to send it to DJI for repair, they are not technical people. There is no delay in sending power anywhere, nor does anything need to 'warm up'. The entire aircraft will receive power as soon as you switch on the battery, but various systems inside the aircraft need to be initialised, and this is done sequentially. So the answer will be that one system is not responding, and the initialisation process is waiting for it, that's where your delay is coming from.

Thank you for that answer. Means I need to find out what between the 2 esc to the 3in1 to flight controller to gimbal is having a slow response to bootup.

I am not willing to send it to DJI for repair. My warranty is way expired and would cost to much to have them to fix it.

Geebax Posted at 10-10 12:53
You won't get a moderator to give any other advice other than to send it to DJI for repair, they are not technical people. There is no delay in sending power anywhere, nor does anything need to 'warm up'. The entire aircraft will receive power as soon as you switch on the battery, but various systems inside the aircraft need to be initialised, and this is done sequentially. So the answer will be that one system is not responding, and the initialisation process is waiting for it, that's where your delay is coming from.

The Power Supply (power module) accepts power from the battery and sends it to other components (boards). It's like a spider, the body is the power supply and the legs connect to the other modules. If the power supply is faulty, it may send power to some modules but not all, therefore it can be tricky troubleshooting the problem. I would start there first.

Tim1985 Posted at 10-9 18:31
Below 30C? Last calibration according to the .DAT file pulled from the P4S internal memory card was done at 30c temp.

Yes, below 30 c.  30 c = 86 F which is plenty warm. Will it hurt to do such a simple thing?

Goldenseal Posted at 10-13 15:26
Yes, below 30 c.  30 c = 86 F which is plenty warm. Will it hurt to do such a simple thing?

Here's a perfect example of what can happen with a faulty power supply.

PHANTOM 4 PRO + V2.0 EXPLODED IN FLIGHT