Our take
The P4 is a very specific portability choice: a pocket DLP projector with local media playback and a small rechargeable battery. Its 80-lumen rating, WVGA-class image, and legacy file environment call for a dark room and a modest screen.
A niche pocket projector for a very dark room, modest image, and local files that the older media player supports.
Do not choose it for ambient light, large bright images, detailed presentations, HDMI-first equipment, long battery sessions, or a current streaming-app platform.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- A rechargeable Li-ion battery and media player are integrated in the documented P4 package.
- The DLP engine, SD/USB playback, and analog inputs fit a self-contained legacy use.
- Its pocket-oriented body is easier to carry than a room projector.
What to weigh up
- An 80-lumen rating is far below the output needed for a bright room or large screen.
- Sources conflict on 854 versus 858 horizontal pixels and LED life.
- A used battery's actual runtime and old Windows CE media compatibility are unknown.
The key details
| Model covered | KP500-01 |
|---|---|
| Image format | WVGA class; saved model references differ between 854 × 480 and 858 × 480 |
| Rated light output | 80 lumens; basis not documented as ANSI |
| Placement | Battery rated around 75 minutes to one hour; local USB and card playback |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
Portability is the point, with tight limits
B&H identifies the P4 by exact manufacturer part number KP500-01 and lists a Li-ion battery rated above 75 minutes. The small DLP chassis can be carried without the permanent mount, lamp housing, and wiring of a theater projector. That convenience is valuable only if the intended image can remain small and the room is dark. The model's image range is a manufacturer claim, not assurance of brightness at the upper size. Plan around its limited output rather than treating portability as proof of broad room capability.
Keep resolution and brightness claims qualified
Saved model sources place the P4 in the WVGA class, but the manual and ProjectorCentral record differ between 858 and 854 horizontal pixels. The exact count therefore stays unknown in matching. The documented 80-lumen figure is also not identified as ANSI, so it cannot be compared directly with an ANSI-labeled projector. Both facts still support a cautious conclusion: the P4 is a low-output, low-resolution device for very small images. Do not read input compatibility as native detail.
Local playback may avoid a separate source
B&H lists an onboard Windows CE processor, internal memory, USB host, and card playback, while the saved guide documents local media features. That can simplify a casual use when the files fit the supported formats and storage. It does not establish Wi-Fi, a current app catalog, or an integrated streaming platform. Test a sample file before relying on it, and plan for an external compatible source if local playback does not meet the need. The P4's VGA and composite inputs are also from an older equipment era.
Battery and light source need individual checks
A retailer listing rates the new battery at roughly an hour, and another source gives a 75-minute figure. Those historical ratings do not describe the remaining capacity in an old unit. Ask for a test away from AC power and check whether the projector can operate and charge as expected; the guide has specific charging notes. The LED-life sources also differ between 15,000 and 20,000 hours, so do not treat either as a precise promise for an existing sample.
Choose it only when file and image constraints fit
The P4 may work for a small casual image in a dark place, but the cited product documentation does not support presentations under room lights or a large home-theater screen. A 2012 review described an external-input limitation with widescreen use on the firmware it tested; treat that observation as a warning to test the exact unit, not a universal claim about every firmware revision. Check focus, color, battery, card reader, remote, cables, and every intended source before buying. The historical Amazon identifier does not prove a current exact offer.
What else to compare
AAXA P1 Jr. is even lower output and VGA resolution, while the AAXA P6X offers a higher WXGA-class image and a distinct battery profile.
Before you buy
Is the P4 native WXGA?
No. Saved model sources place it in the WVGA class and disagree on whether the horizontal pixel count is 854 or 858.
Can it make a bright 80-inch image?
The 80-inch size is a source claim, while its light output is only 80 lumens. The evidence supports dark, modest-image use, not a bright-room guarantee.
Will the battery still run for an hour?
The historical rating describes a new battery. Capacity and runtime on a surviving used unit are unknown and should be checked directly.
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.
- B&H exact MFR listing and AAXA P4 source packet ↗ — checked October 4, 2026.
- B&H P4 exact MFR, battery, and feature listing ↗ — checked October 4, 2026.
- AAXA P4 manufacturer archive ↗ — checked October 4, 2026.
- AAXA P4 user guide copy ↗ — checked October 4, 2026.
- ProjectorCentral P4 model record ↗ — checked October 4, 2026.
The decision
The P4 is a constrained pocket projector, not a room-theater substitute. Its appeal depends on battery portability, compatible local media, a very dark space, and a healthy individual unit.
Is it the right fit?
Check the exact model and today’s offers on Amazon.