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Head-to-head · Best Outdoor Projectors

Anker Nebula Mars 3 Air vs BenQ GV31

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Anker Nebula Mars 3 Air and BenQ GV31 score essentially the same (4.0 vs 4.0). Pick the one whose trade-offs match your priorities — the strengths and watch-outs below are where they actually differ.

Anker Nebula Mars 3 Air
Ranked #3 in Best Outdoor Projectors
Anker Nebula Mars 3 Air
3 sources1 derived$600as of Aug 1

Half the brightness, a third the weight, half the price: the Mars 3 Air is the budget-balanced Mars sibling. Projector Central measured 399 ANSI lumens, exactly on spec, and What Hi-Fi gave it 4/5, calling it a 'mobile movie marvel.' Pick it when you want a portable Google TV projector at a backyard-friendly $469 and can live without the full Mars 3's ruggedized 1000-lumen output.

Strengths
  • — Projector Central measured 399 ANSI lumens against a 400-lumen rating, nearly perfect honesty on the spec sheet
  • — Light 3.7-lb chassis you can backpack to a campsite or balcony without thinking about it
  • — 2.5-hour movie battery (3 hours 10 minutes in eco) covers a full feature on a single charge
Watch-outs
  • — 400 lumens is the bare minimum for outdoor; image dims noticeably above a 100-inch diagonal
  • — Conference-mode fan noise of 40.3 dBA per Projector Central is louder than the Mars 3
  • — No USB-C video input limits laptop and console hookups
$600 · Buy at soundcore.comFull review →
BenQ GV31
Ranked #5 in Best Outdoor Projectors
BenQ GV31
2 sources1 derived

BenQ's GV31 has the most interesting form factor here, a rotating ball-in-a-cradle that aims anywhere from a low coffee table up to a 135-degree ceiling angle. The 300 ANSI LED engine is dim and $599 is not budget territory. Set against that: a 5-hour audio/3-hour video battery, a 2.1-channel speaker and a clean Android TV stack with native Netflix, which make it the best 'fun shape' option in the roundup.

Strengths
  • — Rotating lens tilts up to 135 degrees, projecting onto walls, ceilings or angled garage doors
  • — 5800 mAh battery delivers 3 hours of video playback (5 hours music) per BenQ spec
  • — 2.1-channel speaker system with 8W woofer and dual 4W tweeters punches above projector norms
Watch-outs
  • — 300 ANSI lumens is the second-dimmest in this guide; outdoor use requires full nightfall
  • — Limited HDR support and no Dolby Vision
  • — Cylindrical body in cradle is not very stable on uneven yard surfaces without a tripod
Buy at benq.euFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Anker Nebula Mars 3 Air

Delivers about two-fifths of the measured brightness of the Anker Nebula Mars 3 (399 versus 959 ANSI lumens) and half the battery runtime, but a third of the weight at 3.7 lb. Brighter and louder than the Samsung The Freestyle 2nd Gen by a wide margin, and slightly dimmer than the XGIMI Halo+ but with the better Google TV software stack and longer battery life. The BenQ GV31 is dimmer at 300 lumens and projects from a rolling-ball form factor.

BenQ GV31

Dimmer than the Anker Nebula Mars 3 Air at 300 vs 399 ANSI lumens but with a more interesting form factor and a stronger 2.1-channel audio system. Substantially dimmer than the Mars 3 or XGIMI Halo+ and not in the same outdoor-cinema league. Brighter than the Samsung Freestyle 2nd Gen at 300 vs 230 lumens and with native Netflix and a battery built in, no $189 accessory required.

Specs side-by-side

SpecAnker Nebula Mars 3 AirBenQ GV31
Native Resolution1920 x 1080 (1080p)1920 x 1080 (1080p)
Brightness400 ANSI lumens (399 measured)300 ANSI lumens
Light SourceLEDLED
Throw Ratio1.2:11.30:1
Screen SizeUp to 150 inches30 to 120 inches
Speakers2x 8W Dolby Audio2.1-channel (8W woofer + 2x 4W)
Battery Life2.5 hours (3h10m in eco mode)Up to 3 hours (180 min)
Weight3.7 lb (1.7 kg)3.7 lb
Smart OSGoogle TV with licensed NetflixAndroid TV with native Netflix
Fan Noise40.3 dBA in Conference mode28 dBA (Eco 26 dBA)
Battery—5800 mAh, up to 3 hours video / 5 hours music
Inputs—HDMI, USB-C with PD
Special Feature—135-degree rotating lens
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