I pulled my Mavic 3 out of the cupboard last weekend. First time since late November. The batteries were sitting in their storage bags at what they claimed was 50%, the props looked fine at a glance, and my instinct was to just charge everything up and go fly as the weather is amazing.
I didn’t. And neither should you.
Every April, I see the same posts on social media and forums — “why is my drone throwing a battery error,” “lost signal 200m out on the first flight of the year.” Most of it is avoidable with an hour of prep. Here is the checklist you actually run before the first spring sortie.
Batteries first — and don’t trust the percentage reading
If your packs sat through the winter, the voltage has drifted. Smart batteries (like DJI) self-discharge, and if you stored them at 50–65% like you were supposed to, they are probably sitting closer to 40-45% now. Lithium cells that dip too low for too long get tired, and “tired” is a polite word for “measurably less capacity than last September.” This is the reason why you should never leave a fully discharged battery for a long period of time.
Before you fly, run one full charge and one partial discharge cycle on each pack. Check the temperature — ideally charge in a room between 18°C and 22°C, never in a cold garage, never on a sunny windowsill. Then look at each battery from every angle. Any swelling, any puffiness, any battery that will not fit correctly in the drone´s battery compartment — retire it. A swollen pack is a fire, not a flight.
This is also the place where most pilots lose track. How many cycles on pack 3? When did I last charge pack 5? I used to keep an Excel spreadsheet. Most fleet managers I have met over the years do the same, and they are all a little ashamed of it. Platforms like AirHub log cycle counts, last-charge dates, and battery age automatically, which means one less piece of seasonal detective work. Pay attention to cycle count — DJI Intelligent Flight Batteries start degrading past 200 cycles for the compact drones and 400 cycles for the M350/M400 big enterprise drones.
Firmware and databases before first flight, not during
Power up the aircraft, the RC, and start the DJI Fly or DJI Pilot 2 app on a stable Wi-Fi connection. Update everything before you leave the house. First-flight-of-the-season firmware surprises in a field are a rite of passage I would rather skip.
On DJI drones, pay attention to the FlySafe GEO database as a separate item. The EU geo-zone maps have been shifting quietly all winter — national aviation authorities keep adjusting restricted areas, temporary NOTAM zones, and airport buffers, and the DJI FlySafe update is how that reaches your aircraft. Open the app, let it sync, and confirm the database version before you take off. An out-of-date GEO database is how pilots get polite letters from the authorities.
Note: DJI pushes RC firmware and geo-data updates separately from aircraft firmware. Let all three finish.
Props — UV has been at them
Propellers are the cheapest critical part on the aircraft and the most underinspected. Run your fingernail along every leading edge. Hold each one up to the light and look for hairline cracks near the hub. If anything looks off, replace the set. A new set costs less than the insurance excess on a crash.
A few more things
Hover at two meters for a full minute on the first flight — you are checking for unusual vibrations, gimbal drift, anything that sounds or looks wrong. Charge the controllers too; the remote batteries are the ones that always catch me out. Clear the cached flight logs before the season starts so you can spot patterns cleanly through the summer. And if you are flying somewhere new, scout the takeoff spot on foot before you unfold the aircraft. Check you airspace. None of that shows up on a satellite map.
One more: when the drone asks for a compass calibration, do it. This is not a Reddit tip, it has been part of DJI’s pre-flight routine since the Phantom days, and it still catches people out. Calibrate only when the aircraft prompts for it, calibrate away from steel and concrete, and never in an underground parking garage on the way to the field.
One clean flight before the real job
Whatever you are flying this summer — inspections, mapping, public safety, or just weekends over the coast — do not let the first flight be the paid one. Pick a boring field. Fly a bit. Land. Then go to work.
Thank you for reading! If this helped, share it with the pilot in your team who still stores batteries in the garage.
