How to force charge Phantom 4 Pro battery

[Yt2]

Hi Guys,

Can anyone tell me how to force charge a P4 pro battery?
I was able to do it with my P3 pro batterys.
Need to fully charge a 3 day old battery.
Cheers...

 

[ryantrax]

To top it off do it the same way, Turn the battery on then plug it in. It should start charging.