1. Regulatory Background

On April 14, 2026, Brazil's National Telecommunications Agency (ANATEL) officially issued Act No. 5314/2026 (Ato n° 5.314/2026), establishing a brand-new safety compliance certification system for lithium battery packs used in stationary application scenarios. The act will be officially enforced on October 12, 2026, meaning that relevant products entering the Brazilian market after this date must obtain the ANATEL certification mark complying with the new regulation.

Brazil is one of the world's largest telecommunications equipment markets. In recent years, demand for stationary lithium batteries in sectors such as base station communications, data centers and distributed energy storage has continued to grow. The new regulation is mainly aimed at addressing the uneven product quality in the market and establishing a systematic and verifiable safety technical barrier.

2. Applicable Scope

Act No. 5314 clearly defines three applicable scenarios: • 24V/48V DC power supply lithium battery packs used in mobile communication network facilities (such as base station UPS) • Lithium battery packs for backup power of data centers and enterprise-level communication equipment • Lithium battery packs supporting industrial stationary Energy Storage Systems (ESS)

It should be noted that the following two categories of products are explicitly excluded from the applicable scope: • Power bank type lithium batteries for portable consumer electronics • Traction lithium battery packs for Electric Vehicles (EV)

The regulatory objective of this act is clear, focusing on establishing a safety barrier for high-power, long-operating stationary lithium batteries, which is significantly different from the safety standards required for consumer-grade products.

3. Technical Standard System

The most prominent highlight of this act is that it builds a compliance system combining Brazilian local standards and international standards. Specifically, the requirements of multiple standards must be met simultaneously:

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Among them, ABNT NBR 16975 and NBR 16976 are mandatory local Brazilian standards, which are the core basis for obtaining the ANATEL certification mark. International standards supplement requirements for electromagnetic compatibility, functional safety and Battery Management System (BMS) and other items.

4. Main Test Items

According to the above standard system, the mandatory battery safety tests mainly cover the following aspects:

4.1 Electrical Safety

• Overcharge Protection Test • Over-discharge Protection Test • Short Circuit Protection Test • Overcurrent Protection Test

4.2 Thermal Safety

• Thermal Abuse Test • High Temperature Storage Test • Temperature Cycling Test • Thermal Runaway Propagation Assessment (for system-level sold products)

4.3 Mechanical Safety

• Crush Test • Drop Test • Vibration Test

4.4 Electromagnetic Compatibility (EMC)

• Radiated disturbance and conducted disturbance (per IEC 61000 series) • Immunity tests (ESD, lightning surge, etc.)

4.5 Functional Safety (BMS)

• Assess BMS functional safety level (SIL) per IEC 61508 • Fault mode identification and fail-safe response verification

5. Product Classification & Certification Mode

Act No. 5314 classifies applicable products as Category III mandatory certification products. This category requires enterprises to send products to ANATEL-accredited testing laboratories for third-party review, rather than relying solely on self-declaration. Minor adjustments within the validity period of the certification mark do not require re-testing. The act also stipulates that regular audits shall be conducted every three years under the certification mode.

6. Implementation Timeline

Key timelines are as follows: • April 14, 2026: Official release of Act No. 5314 • October 12, 2026: Mandatory enforcement of the act. Products that have obtained the old version of certification before this date can continue to be sold without impact; if certification renewal is required, it shall be implemented in accordance with the new requirements. • After October 12, 2026: Newly imported products must hold the ANATEL certification mark corresponding to Act No. 5314.

The transition period is relatively tight. It is recommended that relevant enterprises assess the gap between existing products and new standards as soon as possible, and arrange testing and certification work in advance.

7. Summary

The issuance of Brazil ANATEL Act No. 5314 marks that Brazil has established a systematic entry threshold for stationary lithium batteries entering the telecommunications market. Consistent with the trend of multiple global markets, this act will improve the safety level of stationary lithium batteries sold in Brazil. Relevant Chinese lithium battery manufacturers are advised to pay attention to the changes in certification requirements, deploy response strategies in advance, ensure that products complete certification before the mandatory enforcement date, and avoid market access risks.

This article is compiled and released by Guangdong Energy Storage Testing Technology Co., Ltd., for industry reference only. For specific certification requirements, please refer to the official announcement of ANATEL.