Weird battery charging issues

dannyboy75 · 2025-07-20T08:33:17-0400

I picked up a new Mini 4 Pro a few days ago - the Fly More pack which includes the two spare batteries and the 3 battery charger.

I tried using the 3 battery charger yesterday for the first time. At that point I hadn’t used either of the spare batteries so wasn’t sure what state of charge they were in. So I put all 3 batteries in the charger. The ‘original’ battery that came installed in the drone started charging fine. But the other two both blinked LED 3 twice every second. I removed both of them, tried inserting one of them and it seemed to start charging for a while, but then went back to doing the same thing. The third battery just always seems to do the blinking LED 3 thing. Am I doing something wrong? I just assumed that I could insert all 3 batteries and it would charge each of them in turn, until they’re all charged. Then they should all show 4 green LEDs?

It seems unlikely I’d have two faulty batteries out of three. So at this stage I’m leaning towards it being user error. Appreciate any advice though.

Here’s a video which shows what I mean:

Thanks,
Danny

GadgetGuy · 2025-07-20T08:48:07-0400

Have you tried charging either of the other two batteries inside the drone, instead of the hub?

Felix le Chat · 2025-07-20T09:55:27-0400

The speed of the flashing LED's on the battery that is accepting charge suggests you're using a charging brick that is less than 30watt output.

It may be that the charger can't draw enough power to even check the charge state of the other two batteries clipped into the hub.

Try a charging brick that kicks out a minimum of 30watts. Also choose a USB-C to USB-C charging lead that can handle fast charge. Both will never be a wasted investment.

dannyboy75 · 2025-07-20T14:06:31-0400

GadgetGuy said:
Have you tried charging either of the other two batteries inside the drone, instead of the hub?

Thanks, yes I did try that with one of them though.

dannyboy75 · 2025-07-20T14:11:57-0400

Felix le Chat said:
The speed of the flashing LED's on the battery that is accepting charge suggests you're using a charging brick that is less than 30watt output.

It may be that the charger can't draw enough power to even check the charge state of the other two batteries clipped into the hub.

Try a charging brick that kicks out a minimum of 30watts. Also choose a USB-C to USB-C charging lead that can handle fast charge. Both will never be a wasted investment.

Yes just checked the charger I was using and it's 20W. I don't have any rated for >30W, so time to invest in one, by the sounds of it. Will give that a go. Thanks Thumbswayup

mwilson315 · 2025-07-20T15:11:21-0400

One thing it could be. The DJI charger charges one battery at a time, starting with the battery with the highest remaining charge. That enables the quickest time to get a battery fully charged and the drone back in the air.