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.

The short answer

Anker Nebula Mars 3 Air comes out ahead by a clear margin (4.2 vs 3.9). The gap is mostly about Buyers who want a Google TV portable for occasional backyard movie nights and travel under $500, without the cost or weight penalty of the full Mars 3. — read the strengths below before deciding.

Higher ratedRanked #3 in Best Outdoor Projectors

Anker Nebula Mars 3 Air

4.2

$600as of May 23

The Mars 3 Air is the budget-balanced Mars sibling: half the brightness, a third the weight, half the price. Projector Central measured 399 ANSI lumens exactly on spec and What Hi-Fi gave it 4/5, calling it a 'mobile movie marvel.' It is the right pick if you want a portable Google TV projector at a backyard-friendly $469 and don't need 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 · Check Price on Amazon Full review →

Ranked #5 in Best Outdoor Projectors

BenQ GV31

3.9

$599as of May 23

BenQ's GV31 is 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 the price is closer to $599 than budget, but the 5-hour audio/3-hour video battery, 2.1-channel speaker and clean Android TV stack with native Netflix 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

$599 · Check Price on Amazon Full review →

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

Spec	Anker Nebula Mars 3 Air	BenQ GV31
Native Resolution	1920 x 1080 (1080p)	1920 x 1080 (1080p)
Brightness	400 ANSI lumens (399 measured)	300 ANSI lumens
Light Source	LED	LED
Throw Ratio	1.2:1	1.30:1
Screen Size	Up to 150 inches	30 to 120 inches
Speakers	2x 8W Dolby Audio	2.1-channel (8W woofer + 2x 4W)
Battery Life	2.5 hours (3h10m in eco mode)	—
Weight	3.7 lb (1.7 kg)	—
Smart OS	Google TV with licensed Netflix	Android TV with native Netflix
Fan Noise	40.3 dBA in Conference mode	—
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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