Reolink Argus B420 Wireless Battery-Powered Camera [Hong Kong Official Stock]

2304 x 1296 (3.0Megapixel) at 15 frames/sec｜5200mAh rechargeable battery｜Reolink Solar Panel／DC Power／USB-C Port｜2-Year Hong Kong Warranty

Product Overview

The Argus B420 is a Reolink battery-powered wireless camera with an official resolution of 2304 x 1296 (3.0Megapixel) at 15 frames/sec, featuring a lens 5／Daylight Sensor／6／Built-In PIR Motion Sensor and a 5200mAh rechargeable battery.

All specifications on this page are taken directly from the Specifications table on Reolink’s official product page, transcribed line by line without estimation or conversion; items not listed officially have not been added.

A battery-powered camera does not require cables to be run, but the installation location must have stable WiFi coverage, and the battery level should be checked regularly. If you are unsure whether the signal is strong enough, you can send us a photo of the installation location before placing your order.

Argus B420 Exterior Appearance (Official Image)

Six Key Highlights

Battery Power with Solar Charging

The Argus B420 uses a 5200mAh rechargeable battery; solar charging is supported with Reolink Solar Panel／DC Power／USB-C Port.

The core advantage of a battery-powered camera is that it requires “no cabling at all”: it can be installed on exterior walls, rooftops, fences, and in rental properties where drilling or running power cables is not possible. The trade-off is that you need to monitor the battery level, and recording is generally triggered by detection rather than running continuously 24 hours a day.

The official specifications note that battery life is affected by settings, usage, and temperature. In practical use, the battery can last well through summer, while winter requires more attention; lowering the detection sensitivity and notification frequency can significantly extend battery life.

Image Quality and Lens

Official resolution: 2304 x 1296 (3.0Megapixel) at 15 frames/sec, with a lens 5／Daylight Sensor／6／Built-In PIR Motion Sensor.

The viewing angle is Fixed lens, 100° diagonal／Night Vision／up to 10 Meters (33ft) (LED: 6pcs/14mil/850nm)／Digital Zoom. The wide-angle design is suitable for wall mounting to cover an entrance and adjacent passageway at the same time; a narrower angle is more suitable for focusing on a single target, such as a metal gate or parking space.

Before installation, measure the distance from the installation point to the target, then decide whether to mount the camera higher or lower. The coverage can vary greatly when the same camera is mounted at 2.5 metres versus 3.5 metres high.

Night Vision and Full-Color Mode

Official infrared night vision: .

Full-color night vision: Not specified officially.

Infrared footage is black and white, discreet, and less likely to disturb passers-by; full color relies on spotlight illumination to preserve the colors of clothing and vehicle bodies. During installation, avoid pointing the camera directly at a white wall or metal awning, as reflected light may cause overexposure in the center of the image.

PIR Detection and Mobile Notifications

Smart detection: Not listed in the official specifications table.

Battery-powered cameras rely on PIR (passive infrared) sensing to detect body heat, so recording only when motion is detected is the key power-saving design. Traditional motion detection can be triggered repeatedly by tree shadows and changes in lighting, quickly draining the battery.

Notifications can be enabled or disabled individually. To extend battery life, lower the notification frequency and set the sensitivity to a medium level; to capture more activity, increase the sensitivity, but be prepared to recharge more frequently.

App, Two-Way Talk, and Storage

Audio: Two-way audio／PIR Detection & Alerts／PIR Detecting Distance／PIR detection/Person Detection/Vehicle Detection.

No speaker is listed officially, so the camera can only record audio and cannot broadcast to the scene through the App.

Storage: 4／Speaker／5／USB-C Port, which is local storage and does not require a monthly fee. A Reolink NVR or Hub can also be added for centralized backups.

Installation Location and WiFi Signal

The battery-powered camera has no network cable, so the signal depends entirely on WiFi. Before installation, use the Reolink App to test the signal strength at the location: do not install if it is below two bars, otherwise you may experience situations where footage is recorded but cannot be transmitted, resulting in choppy playback when reviewing it later.

An installation height of 2.5 to 3 metres is recommended: mounting too low makes the camera easier to touch or tamper with, while mounting too high causes faces to be viewed from above. Tilting the camera downward by 15 to 20 degrees can provide a good balance between capturing faces and the ground.

A common issue in Hong Kong is that exterior walls are made of reinforced concrete, which causes significant signal attenuation. If the signal is insufficient, try adjusting the router antenna toward the installation location, or add a Mesh node between the two. This usually makes a more noticeable difference than switching to a more expensive camera.

Unboxing Checklist

The following is the package contents for Hong Kong official stock. Actual accessories may vary by shipment batch; please contact us for confirmation before placing your order if you have any questions.

• Argus B420 Camera x1
• Battery (built-in) x1
• Mounting screw kit and alignment sticker x1
• USB-C charging cable x1
• Quick Start Guide x1
• Hong Kong official stock warranty certificate x1
• If you need to purchase the solar panel separately, please contact us to check compatible options.

Suitable Scenarios

The scenarios below reflect situations that this model can realistically handle. If your installation environment differs from those listed below (for example, there is no WiFi signal at all or the installation location is shaded all day), please contact us for confirmation first.

• Village house exterior walls: No wiring required; covers the main entrance and driveway entrance
• Rooftops and fences: Ample sunlight allows continuous solar charging
• Rental units: No drilling or wiring required; take it with you when you move
• Shop back doors and back alleys: Motion-triggered recording saves power
• Warehouse perimeters: Check remotely via the App

Why Choose This Model

• No wiring required at all, so installation is not restricted by the availability of a power source
• Solar charging works with Reolink Solar Panel／DC Power／USB-C Port, allowing continuous charging in sunlight
• Local storage (4／Speaker／5／USB-C Port), so you can review recordings without a monthly fee
• Records only when PIR detects motion, saving power while reducing unnecessary footage
• 2-year Hong Kong official stock manufacturer warranty with local support

Full Specifications

Compare Models in the Same Series

The table below lists only four dimensions that affect your purchase decision, making it easier to choose a model based on the distance and environment at the installation site; please contact us for other specification differences within the same series.

Frequently Asked Questions

Want to confirm whether the installation location has WiFi coverage?

Send us a photo or floor plan of the installation location, and we will recommend the installation height, antenna direction, and whether an additional solar panel is needed based on the site environment.

Hong Kong Authorized Product｜2-Year Manufacturer's Warranty｜Local Support