Our take
ASUS S1 is a pocket-size LED projector with native WVGA 854 × 480, a fixed 1.1:1 short-throw lens, HDMI/MHL input, and a 6000 mAh internal battery. ASUS lists 200 lumens without an ANSI label and rates battery use up to three hours. It is therefore a portable convenience option for a small image in a dark setting, not a bright-room or high-detail projector. The battery can also act as a power bank, but the used unit's remaining capacity is unknown. Confirm the included charger and model label before buying; a battery-aged example may behave differently from the published rating.
Occasional portable viewing with an HDMI/MHL source in a dark room and a small screen.
It is not for native HD/Full HD, large bright-room images, UST installation, streaming apps, or a used battery whose runtime must be guaranteed without testing.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- ASUS documents native WVGA 854 × 480, RGB LED, and HDMI/MHL connections.
- A 6000 mAh internal battery and power-bank function support temporary use away from an outlet.
- The fixed 1.1:1 lens can create a larger image from a relatively close portable position.
What to weigh up
- The 200-lumen figure is not labeled ANSI, and output is modest for room-light viewing.
- Native WVGA is low detail compared with HD and Full HD projectors.
- Battery health, runtime, and accessories vary with the specific renewed or used unit.
The key details
| Model covered | S1 |
|---|---|
| Image format | Native WVGA 854 × 480 |
| Rated light output | 200 lumens (not labeled ANSI) |
| Placement | 6000 mAh battery; 1.1:1 fixed short throw; RGB LED |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
The battery is the main reason to consider S1
ASUS specifies a 6000 mAh internal battery and up to three hours of rated use, plus a power-bank function. That makes the S1 unusual among projectors that otherwise require continuous AC power. It can support a short viewing session in a place with limited outlets, but the rating is not a guarantee for a used battery. Age, charge history, brightness mode, and the load on the power bank affect how long it lasts. Ask whether the unit holds a charge and whether the adapter is included. Portability is meaningful here, but it should be balanced against low brightness and resolution.
WVGA makes this a small-image device
The official manual lists an 854 × 480 native image. That WVGA format is suitable for casual video or simple content, but it has much less detail than 720p, WXGA, or Full HD. Fine text, subtitles, game menus, and high-detail graphics are less comfortable at large image sizes. A phone or laptop may output higher-resolution video, yet the S1 panel stays WVGA. Choose a modest screen and viewing distance. If the projector is for work slides or frequent movie nights where detail matters, the native resolution should weigh more heavily than the pocket size or the ability to accept an HDMI source.
Keep the 200-lumen basis unconverted
ASUS lists 200 lumens, not 200 ANSI lumens, in the saved manual. The profile leaves standardized ANSI brightness unknown and does not compare the number directly with models that carry an ANSI label. This is a low-output projector, so a dark room and smaller image are reasonable planning assumptions. The published value also does not establish how bright an older unit remains. Test the exact projector at the intended size if possible and inspect the lens and image uniformity. No independent measurement is part of this review. Brightness marketing should not override the practical limits of the small WVGA panel and battery device.
A fixed short-throw lens needs close measurement
The manual lists a 1.1:1 throw ratio and fixed lens. The short ratio can make it easier to create a usable picture when the projector is close to the wall, but it does not make the S1 an ultra-short-throw device. Measure the desired width and lens distance before placing it on a table or tripod. A fixed lens gives no zoom range, and the saved source does not establish optical lens shift. Digital keystone correction may help a small setup issue but can reduce usable pixels. Keep the projector level and square when possible, and plan how the HDMI source and charging cable will sit.
Expect an external video source
The ASUS manual documents HDMI 1.3/MHL, RGB LED illumination, and a small speaker, but not a built-in streaming-app platform. A compatible phone, computer, or external media player is the practical source plan. Confirm any adapter needed for the chosen phone, since USB-C or Lightning behavior can vary by device. The S1 is LED rather than laser, and its battery operation is documented; those facts should not be confused with an integrated smart-TV system. Check charging, image focus, ports, speaker, remote, adapter, and battery state on a specific renewed unit. This is purchase guidance from the model documentation, not a claim of firsthand use.
What else to compare
For a battery-powered pico projector with an explicit 100 ANSI rating, compare Insignia NS-PR200, while accepting WVGA detail and checking battery wear. For a brighter portable-sized WXGA model that requires AC power, compare Vivitek Qumi Q5.
Before you buy
Does ASUS rate S1 at three hours on every unit?
ASUS lists up to three hours for the battery. The current runtime of an aged or renewed battery may be shorter.
Is the 200-lumen figure ANSI?
The manual says 200 lumens without an ANSI label, so this review does not treat it as ANSI output.
Is S1 ultra-short throw?
No. ASUS lists a fixed 1.1:1 short-throw ratio; this is close placement but not documented UST.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- ASUS S1 manual and product page ↗ — checked October 4, 2026.
- ASUS S1 official manual ↗ — checked October 4, 2026.
- ASUS S1 product page ↗ — checked October 4, 2026.
The decision
ASUS S1 is a portable battery option for modest dark-room viewing. Its fixed short throw helps placement, but the non-ANSI output claim, WVGA image, and battery age must fit the use.
Is it the right fit?
Check the exact model and today’s offers on Amazon.