EZVIZ CB2 4G LTE 2K Fully Wireless Battery Camera｜Works Without Wi-Fi｜2000mAh

2K／3MP｜4G LTE Standalone Internet Access｜2000mAh Battery｜106° Wide Angle｜microSD 512GB｜AI Human and Vehicle Detection

Product Overview

The CB2 4G is a battery camera designed for locations where “there is simply no Wi-Fi”. It features a built-in 4G LTE module—just insert a data SIM card and it connects to the internet on its own. No router, network cable, or power cable is required. Whether installed on the exterior wall of a village house, in a warehouse, a unit under renovation, or around a construction site, you can still view the footage on your phone.

All specifications on this page have been extracted item by item from EZVIZ’s official CB2 4G product page: CS-CB2-R105-1K3F4GA, 1/2.8" 3MP CMOS, 4mm F1.6, 106° (diagonal)／90° (horizontal)／48° (vertical), 2304×1296, 15fps, H.265／H.264, 2000mAh battery, microSD up to 512GB, DC 5V／2A (power adapter sold separately).

Note the difference between this and a regular Wi-Fi battery camera: the 4G version comes with a monthly SIM card fee, but in return offers “complete independence”. Even if your home loses power, your broadband connection goes down, or broadband has not yet been installed, you can still view the footage as long as there is a 4G signal. By contrast, if your installation location already has stable Wi-Fi, the Wi-Fi version will be more economical.

CB2 4G camera body (official image)

Six Key Highlights

A Truly Wi-Fi-Free Installation

There are only two steps: insert the SIM card and power on to pair. The 4G module communicates directly with the cellular network, so you do not need to provide any network environment. This is especially useful for units that are “installing the camera before installing broadband” — you can start recording during the renovation period without waiting for the broadband technician.

The LTE bands officially listed are EU version B1／B3／B5／B7／B8／B20／B28. The 900／1800／2100／2600MHz bands used by Hong Kong’s major telecom operators are covered by this set, so they are generally usable. However, for rural areas, outlying islands, or deep indoor locations with weak signals, it is recommended to test the 4G signal strength with your phone at the same location before deciding.

• Insert the SIM card and use—no router required
• Suitable for renovation periods／construction sites／village houses
• Coverage of commonly used Hong Kong bands (B1/B3/B7/B8/B20/B28)

2K／3MP with a 106° Field of View

The official specifications state 2304×1296 (3MP, referred to as 2K by EZVIZ), 4mm F1.6, and a 106° diagonal field of view. This combination is practical for “one parking space or one entrance”: it is clear enough to see visitors’ clothing and the general outline of license plates, while maintaining good light intake at night.

Optically, 106° is not considered ultra-wide-angle. The advantage is less edge distortion and more natural facial proportions; the trade-off is a narrower coverage area. For larger areas, you will need two cameras or a pan-and-tilt model. When choosing, first decide whether you need to “see wider” or “see clearer”.

• Native 2304×1296 3MP
• F1.6 large aperture helps with nighttime imaging
• Standard-ish field of view, not suitable for large areas

Real-World Battery Life of the 2000mAh Battery

The official battery capacity is 2000mAh. Based on an estimate of 20–30 triggers per day, with 10 seconds of event recording each time, it generally lasts 2–4 weeks. If the installation location has heavy foot traffic or long-duration live viewing is enabled, battery life will be significantly reduced. This is an inherent limitation of the 4G version—the 4G module itself consumes more power than Wi-Fi.

Therefore, the installation location should ideally be within reach for battery removal and charging, or the camera should be used with a solar panel. If you want battery life that can last “a year without attention”, choose an EB series model with 5200mAh or more.

• 2000mAh rechargeable battery
• Heavy foot traffic will significantly reduce battery life
• A solar panel is recommended, or install it in a location where the battery can be removed

AI Human／Vehicle Detection and Two-Way Talk

The official specifications state support for AI human and vehicle detection, as well as two-way talk. Compared with basic motion detection, AI classification can filter out false alerts caused by leaves, raindrops, and changes in lighting. This is particularly important for the 4G version—every false alert triggers a notification and consumes battery power.

Two-way talk lets you speak directly to people at the scene. At warehouses or construction sites, this is often used to tell someone to stop performing a dangerous action or to tell a delivery driver where to leave the goods.

• AI distinguishes people from vehicles to reduce false alerts
• Two-way talk
• False alarms are more costly with the 4G version, making AI filtering even more important

Storage and power supply: two items you need to prepare yourself

For storage, the official specifications support microSD cards up to 512GB; the card must be purchased separately. You can also subscribe to EZVIZ CloudPlay for cloud backup. For power, the official requirement is DC 5V／2A, and the power adapter must be purchased separately — many customers mistakenly think the power adapter is included.

Our recommendation: a 128GB card is sufficient for several months of event recordings. Choose a U3／A2 surveillance-grade card for better endurance; purchase a branded 5V／2A or higher power adapter and install it inside a waterproof box.

• microSD up to 512GB (card sold separately)
• DC 5V／2A power adapter sold separately
• Recommended 128GB surveillance-grade card

Installation location and water resistance: no IP rating listed by the manufacturer

The official specifications for the CB2 4G do not list an IP water-resistance rating. This does not mean it cannot be used outdoors, but it does mean that long-term exposure to direct rain should not be considered guaranteed — the power connector and SIM card slot are the two areas most vulnerable to water.

In practice, install it under an awning, beneath a covered walkway, or in a location where the underside of the camera is sheltered; make sure the SIM card slot and USB cover are firmly closed. If outdoor installation is unavoidable, adding a simple rain shield is much cheaper than paying for repairs later.

• No IP rating listed in the official specifications
• Recommended to install in a sheltered location
• Make sure the SIM card slot and USB cover are firmly closed

Unboxing checklist

The following are the contents of the Hong Kong official distribution packaging. Actual accessories may vary by shipment batch; if you have any questions, please contact us before placing your order.

• Official packaging contents may vary by shipment batch: camera, mounting base, screw pack, USB cable, and quick start guide. The SIM card, microSD card, and power adapter must all be prepared separately.
• Packaging contents are subject to the official Reolink shipping configuration. The official product page does not publicly list every item in the box, so our store does not speculate on the quantity of accessories. If you need to confirm any specific accessory before ordering (bracket, screw pack, or whether a power adapter is included), please contact us first.
• Hong Kong official distribution product, 2-year manufacturer warranty, and local support.

Suitable applications

The core value of the CB2 4G is that it can be installed even without an internet connection. It is most commonly used in the following locations:

• Village houses and the exterior walls of old buildings (where broadband cannot be installed or is unstable)
• Units under renovation and new developments that have not yet been occupied
• Construction site hoardings, warehouses, and farmland
• Rental parking spaces, campervans, and houseboats

Why choose this model

• The only entry-level 4G model with plug-in-and-use convenience, requiring no network configuration
• 2K／3MP ＋ F1.6, providing enough daytime detail to clearly see the entrance area
• Compact 2000mAh design (52×39×39mm、90g), offering greater flexibility in installation locations
• Officially supports AI person／vehicle detection to reduce 4G data usage and false alarms
• Supports microSD cards up to 512GB, allowing local recording without a monthly fee

Full specifications

Compare models in the same series

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Frequently asked questions

CB2 4G: Start recording even before broadband is installed

Before placing your order, tell us the installation location and 4G signal conditions. We can help determine whether the 4G version is suitable, or recommend a Wi-Fi／PoE model instead.

Hong Kong official stock｜2-year original manufacturer warranty｜Local support