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Baseus Security S2 4K surveillance camera review: Local recording and solar-powered battery for unlimited runtime

Privacy surveillance camera?

The Baseus Security S2 comes with a solar panel that automatically aligns with the sun, providing an "endless" runtime without manual recharging. The 4K camera detects unwanted visitors with radar and PIR, even at night. All recordings are saved locally on an SD card. We tested it to see how well it works.
Christian Hintze, (translated by DeepL / Ninh Duy) Published 🇩🇪
Accessory AI Security Smart Home

Verdict - Versatile security camera

Together with the app, the Baseus Security S2 is a very versatile surveillance camera. It can be used to communicate, save known face profiles, set restricted zones and more. Additionally, almost all data remains local, and private zones can be excluded from monitoring. This allows users to retain control over their data, provided they trust the manufacturer.

Besides the rather mediocre image quality, the power-saving battery operation is also problematic, as the S2 always has to be "activated" from sleep mode first. If an intruder only moves past the camera briefly and very quickly, they may not be captured on video. However, this is probably less of a problem outdoors.

Pros

+ 4K picture quality
+ Wide range of functions
+ Speech function with built-in speaker
+ Power-saving, long runtime
+ Local recordings without cloud constraints

Cons

- Too slow to capture short, fast movements
- No alternative installations apart from drilling
- Requires trust in the manufacturer for data privacy
- Only 15 fps, mediocre 4K image

Price and availability

The Baseus S2 normally costs $200 on Amazon, but at the time of writing, a $70 coupon reduces the price to $129.

Amazon Logo
$129.98
Baseus S2 4K Solar Security Cameras Wireless Outdoor - Radar+PIR Detection, AI Face Recognition, Auto Sunlight-Tracking, Color Night Vision, IP67, No Monthly Fee, Local Storage, Featured at CES 2025

The Baseus Security S2 is a battery-powered surveillance camera with 4K resolution. Thanks to the rotatable solar panel on top, which automatically aligns itself with the sun, the runtime should be virtually uninterrupted.

Specifications

Resolution 8 MP photos; 4K video
Frame rate 15 fps
Viewing angle 145 degrees
Motion detection Radar + PIR (passive infrared)
Protection class IP67
Supported storage media SD card up to 256 GB (not included)
Communication Wi-Fi, 2.4 GHz
Detection People, faces, animals, vehicles

Design and equipment - White box with solar panel roof

The Baseus S2 features a box-shaped housing made of white plastic, with a black front panel that houses the camera lens, sensors, and emergency light. A blue status LED is also present but can be turned off via the app.

The small solar panel, which automatically tracks the sun, serves as a "roof". The speaker is positioned at the bottom front, while the MicroSD and USB-C slots are located further back, protected under a rubber cover.
 

This is in the packaging
This is in the packaging
The motor-controlled solar panel is located at the top
The motor-controlled solar panel is located at the top

The camera not only detects the movement of people, animals and vehicles but also recognizes specific faces, up to 10 family members can be "whitelisted" - the only data stored in the cloud. according to the manufacturer, is encrypted, and neither third parties nor Baseus itself should have access to it. The AI recognition calculations are performed locally on the device.

In terms of privacy, it is also possible to define image areas of the camera that should not be monitored. The camera also offers night vision. However, the "color night vision" is pure marketing and is only available when the spotlight is activated. Its sensors cover a radius of up to 8 m.

Declare image areas as private (Image source: Baseus)
Declare image areas as private (Image source: Baseus)
24/7 runtime thanks to solar panel (Image source: Baseus)
24/7 runtime thanks to solar panel (Image source: Baseus)
Does it work like this? (Image source: Baseus)
Does it work like this? (Image source: Baseus)
Weather resistance (Image source: Baseus)
Weather resistance (Image source: Baseus)
SD cards, (almost) everything local (Image source: Baseus)
SD cards, (almost) everything local (Image source: Baseus)

Installation - Drilling is required

The accessories
The accessories

Baseus includes three screws and wall plugs in the package, along with a mounting arm that screwed into the wall. The camera itself has a 1/4 inch thread on the back, allowing it to be attached to the mounting arm or to a tripod. However, accessories for less invasive installation options are not included.
 

The holding arm
The holding arm
First screw on the wall bracket
First screw on the wall bracket
Then screw on the "gimbal"
Then screw on the "gimbal"
The S2 can now take over here
The S2 can now take over here

Baseus Security App - Wide range of setting options

In the app (iOS/Android), you first select your region and create an account. Then, you connect the camera to Wi-Fi and pair it with the app, which requires temporarily enabling location access.

Set region
Set region
Create account
Create account
Connect S2 with WLAN
Connect S2 with WLAN
Settings page 1
Settings page 1
Settings page 2
Settings page 2

You can then view the live image, set options and define profiles such as "Home" (recording but no alarm). You can also create schedules for when and how the camera should be active.

You can speak into the smartphone microphone during the live feed, and your voice will be transmitted to the S2's loudspeaker. For example, family members outside can be informed that the meal is ready. In the same window, you can record videos, take photos and switch the spotlight lamp, alarms, loudspeaker or night vision on and off. 
 

The profiles
The profiles
The live image with options
The live image with options
Save familiar faces
Save familiar faces
Setting the motion detector
Setting the motion detector
Exclude private areas
Exclude private areas
Share camera with other accounts
Share camera with other accounts

Practical test - Start recording too late?

The picture quality could be much better: Despite its 4K resolution, many artifacts and muddy images are visible to the naked eye, likely due to high compression. This becomes clearer at 4x magnification, see below.

Moderate 4K picture quality
Moderate 4K picture quality
Nesting pigeon, 4x enlarged
Nesting pigeon, 4x enlarged
Muddy tree and shrub details - 4x enlarged
Muddy tree and shrub details - 4x enlarged

Since there was no monitored house available, we tested the camera by monitoring our hallway. The app notifies us immediately when movement is detected, and it records videos up to 60 seconds long. This function worked even when we stood in the hallway at night.

The corresponding camera image of the hallway at night
The corresponding camera image of the hallway at night

When someone later walked towards the camera and then disappeared into the side of the bathroom just before the camera, we only received a video of the bathroom door being closed, the person was no longer recognizable. 
 

However, you can set the sensitivity of the detection in the app, which we promptly increased from 3 to 5 (max). After that, detection improved significantly, though it’s still not perfect. When movements are very fast, the sensors sometimes struggle to keep up.

Home Screen
Home Screen
Daily event list
Daily event list
Video of the incident not yet ready
Video of the incident not yet ready
Sensitivity of motion detection
Sensitivity of motion detection

But even with correct sensor recognition, a video recording isn’t always guaranteed. For example, we were only captured on our return when the camera was already activated by the outward journey. However, this issue is less likely to occur outdoors, where the camera covers a larger area.

Camera only records in 15 fps ...
Camera only records in 15 fps ...
... which can make it difficult to identify (fast) offenders
... which can make it difficult to identify (fast) offenders
Outside there is more time and space to react
Outside there is more time and space to react

Brief summary

The Baseus Security S2 Outdoor Camera 4K is a highly versatile surveillance camera with local recording capabilities. However, it sometimes doesn’t react quickly enough from energy-saving mode during very fast movements.

Transparency

The selection of devices to be reviewed is made by our editorial team. The test sample was given to the author by the manufacturer free of charge for the purposes of review. There was no third-party influence on this review, nor did the manufacturer receive a copy of this review before publication. There was no obligation to publish this review. We never accept compensation or payment in return for our reviews. As an independent media company, Notebookcheck is not subjected to the authority of manufacturers, retailers or publishers.

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > Reviews > Baseus Security S2 4K surveillance camera review: Local recording and solar-powered battery for unlimited runtime
Christian Hintze, 2025-08- 9 (Update: 2025-08- 9)