Hi there & welcome to the forum
The
MA gen 1 is in general a very good & competent craft... fast & with a splendid wind resistance including many possibilities that newer DJI crafts miss... the use of 3:rd party apps (like Litchi) for waypoint missions even out of signal range, just to mention one. It still uses the DJI GO4 app (only downloadable through DJI's own site
HERE as the app stores doesn't have it anymore), the app is rather fully featured as opposite the newer DJI Fly app used for the newer crafts... even if it have caught up some nowadays. It's also a very portable craft with the possibility to be manoeuvred with the RC, only with a mobile device without RC & just by hand gestures. Camera wise it's fully sufficient for personal use, in good lightening & if cropping rarely is needed.
You have the full downloadable user manual here -->
https://dl.djicdn.com/downloads/Mavic Air/20180525/Mavic Air User Manual v1.2.pdf
It's only one drawback, & unfortunately a big one... DJI have stopped to make batteries for it & no 3:rd party have taken over.
LiPo batteries doesn't like to be unused, the cell voltage slowly decreases until the level is below 3V where the battery starts to be permanently & seriously damaged through electrolyte decomposition. All DJI batteries have a Battery Management System (BMS) board inside which mainly turns the battery off pretty much permanently when a cell falls too low. Theoretically the BMS can be forced to open the circuit again but that is with a lot of special equipment & heavy DIY. And it's no use to just go through all that work to just restart the BMS... it turned off due to that the cells had become bad, so you need to swap some or all 3 cells out & get them connected.
So... refresh or repair bad LiPo cells is in general not possible, you might be able to swap the cells inside the battery enclosure & restart the BMS but that is a serious DIY with only YT videos to guide you how to do it & what equipment you need. The only thing you can try is to leave the battery in the charger for a long time, like 24h (use only the charge cable, without the charge hub)... if you're lucky that might slowly get them up in voltage... but personally I wouldn't trust a battery being that low so it appears dead even if it resurrects, pretty high risk it will later fail airborne.
Have a
MA myself, doesn't fly it much nowadays as i'm putting my time on flying FPV quads instead... but put great care on my 8
MA batteries anyway with at least one full charge cycle each quarter to make them last, & similar to the RC LiPo battery.