Hi all

How long can a Pro's battery lie before it gets damaged or so?

Wanting to buy a 2nd hand people, which is a year old, with about 4 hours flight time and flew last 2 months ago...

Do you think the Batts should be still good?

If we are talking about DJI inteligent battery they are automatically discharged to 60 or 65% after not used for more than 10 days, so from that point of view year old battery will be absolutely fine if it was not defective from factory.

Thnx. Yes I'm referring to the batteries of a Mavic Pro... They also intelligent classified right..?

From what I have read if the batteries are stored for a very long time the cells can get damaged when charged and would not balance out, I suggest you test them first before buying them. put it on charge and check out the cells in the go4 app, by the way what are you paying for the 2nd hand batteries?

You can insert the battery on the drone and connect the app to see if there is an error code about the battery. If there is no error message, no worries.
The battery life is 200 charging cycles, if more than 200 charging cycles or there are error codes or damages, please don't continue using it.
For the battery maintenance, you can refer to the tutorial below.

As long as the battery still takes a charge it should be fine.

fully agree with TO88, if it takes the charge no problem.