DJI Mini 4 Pro — the sub-250 g king, tested

The verdict

Twenty-two missions, 11 hours 40 minutes of logged airtime, one alarming encounter with a Bristol seagull. The Mini 4 Pro is the rare product where the marketing checklist survives contact with a British winter: genuinely omnidirectional obstacle sensing, 4K/60 that holds up against drones twice the price, and — the number that matters most in this country — 249 g on our calibrated scale with the standard battery fitted. That last gram is worth more than any camera spec, and we'll explain why in section 3.

The catch, such as it is: the standard battery's 34-minute claim is optimistic in real UK air, the Plus battery that fixes it pushes you over 250 g and into Flyer ID territory, and used examples hide their history in two places most sellers never mention. Launch pricing was £689 drone-only and £869 for the Fly More Combo; clean used examples now trade at £450–£550, which makes this the best-value first drone on the market — provided you check the two things in our section 5 checklist before handing over cash.

How we tested

Our standard drone protocol: 22 missions across four months and three environments — open farmland in Wiltshire, a suburban estate in Swindon, and Bristol's harbourside for the built-up transmission test. Every flight logged from 100% charge to the 20% RTH prompt, winds recorded with a handheld anemometer at launch, and the obstacle course is our usual one: a 12-gate slalom of washing lines, tree canopy and one strategically parked estate car.

The 249-gram loophole, explained

Under UK CAA rules, a sub-250 g drone with a camera needs an Operator ID (£11.79 a year, stick the number on the airframe) but no Flyer ID — no test, no exam, nothing. It can also fly in the A1 category: over people, closer to buildings, in places a 250 g-plus drone legally cannot go without distance rules that make most urban and park flying impossible. This is the Mini 4 Pro's entire reason for existing, and DJI engineered right up to the line: 249 g with the standard battery. Fit the Intelligent Flight Battery Plus and you're at 289 g — congratulations, you now need a Flyer ID and you've lost the A1 privileges you paid for. Our advice after 22 missions: buy standard batteries, buy three of them, and keep the loophole you bought the drone for.

Batteries: what cycle counts actually do

DJI rates the standard battery for 200 cycles to 80% health, and our sample set broadly agrees. A fresh cell gave us 27 minutes of real flying; a 90-cycle battery from our long-term Mini 3 Pro fleet (same cell family) gave 24; a tired 160-cycle example managed 21 and threw a voltage warning descending in a 20 mph headwind — the moment cycle count stops being an abstraction. Cold matters too: sub-5°C mornings knocked a further 3–4 minutes off every battery we flew, fresh or not. The good news is the DJI Fly app records cycle count per battery and can't easily be reset, which makes used batteries one of the few honest components in the second-hand drone market. Price accordingly: a Fly More Combo with three sub-30-cycle batteries is worth £60–£80 more than the same kit with tired cells.

Buying a used Mini 4 Pro — the 5-minute checklist

• Inspect the gimbal ribbon cable — the thin flat cable behind the camera is the Mini's known weak point after a nose-down landing. Look for creases, tears or tape; power on and check the gimbal sweeps its full range smoothly with no juddering or horizon tilt. A damaged ribbon is a £60–£90 repair and sellers rarely volunteer it.
• Check battery cycle counts in the DJI Fly app (connect each battery, tap the battery icon → details). Under 50 cycles is excellent, 50–120 is fair, over 150 means budgeting £55 per replacement cell.
• Pull the flight logs in the app and look for the last flight ending mid-air, altitude anomalies, or a crash event — logs sync to the account and a wiped drone with no history is a question, not an answer.
• Check all four sensor windows (front, rear, lateral, downward) for scratches and haze, then confirm obstacle sensing triggers by walking toward the hovering drone. Gouged sensor glass quietly disables the omnidirectional sensing you're paying the premium for.
• Verify the seller unbinds the drone from their DJI account in front of you — a bound drone cannot receive firmware updates or activate warranty service, and DJI will not unbind it for you.

Who shouldn't buy one

• Coastal and hilltop flyers — 24 mph is the honest wind ceiling; a Mavic 3 holds a horizon in gusts that send the Mini home early.
• Anyone who needs the Plus battery's endurance as standard — at 289 g you've bought a heavier drone with lighter-drone optics; look at an Air 3 instead.
• Low-light specialists — the 1/1.3-inch sensor is superb for its size and still a 1/1.3-inch sensor; dusk footage gets noisy past ISO 1600.
• Sport-mode racers — obstacle sensing switches off in Sport, and our slalom results show what happens next.
• Anyone planning commercial work in crowds — sub-250 g eases hobbyist rules, not the operational authorisations paid jobs may still require.

DJI Mini 4 Pro for sale now