Alright a buddy gave me a mavic air gen 1 because his batteries stopped working (he let them sit for over a year and they no longer work).  No biggie just gotta buy new batteries....but now the new batteries are not working in the drone...what do I do?

Hello, there. Sorry for your inconvenience. May we know whether the battery can be charged? Are there any indicator lights showing when you plug in the charger?