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This part of IEC 62133 specifies requirements and tests for the safe operation of portable sealed secondary lithium cells and batteries containing non-acid electrolyte, under intended use and reasonably foreseeable misuse.

This standard establishes minimum requirements for susceptibility of cells, and batteries to the abuse and environmental effects that these cells and batteries may encounter in handling, transport and storage, but does not presume to account for these effects in specific applications, which are left to the requirements of the combination of the battery and end-use equipment in the end-use equipment standards.

Coin cells with an internal resistance greater than 3 Ω measured in accordance with IEC 61960-4:2024, 6.6, and batteries made from them are out of the scope of this document. The instructions for preventing accidental ingestion of those coin cells and batteries are specified in IEC 60086-4:2025, 7.2.

This standard does not address functional safety of the electronic and programmable electronic battery controls.

This standard addresses first life cells and batteries. In the case of reused, repurposed or second life secondary lithium cells and batteries, additional requirements and tests should be considered.

In addition to the requirements explicitly outlined in this standard including markings and instructions, it is essential to consider other potential safety risks that cannot be fully addressed. These include, but are not limited to, hazardous voltage exposure, flammability risks for non-metallic materials, and other application-specific safety concerns.

Compliance to this standard alone cannot be sufficient for safe integration of a cell or battery in the end-use equipment if only the cells or batteries comply with this standard with no additional evaluation.

NOTE 1 Annex C of this standard provides guidance for further considerations when battery specific criteria are not covered in the end-use equipment standard.

Portable applications comprise hand-held equipment, transportable equipment and movable equipment.

Examples of the main uses are shown below:

hand-held equipment: smartphone, tablet PCs, audio/video players, and similar equipment;

transportable equipment: notebook computers, CD players, and similar equipment;

movable equipment

18 kg or less in mass and not fixed in place, or

provided with wheels, castors, or other means to facilitate movement by an ordinary person as required to perform its intended use,

power tools, power assisted cycles, business-use video cameras, and similar equipment.

NOTE 2 EESS (Electrical Energy Storage Systems) and UPS, which use batteries over 500 Wh of electric energy are excluded.

NOTE 3 Self-propelled vehicles are excluded

This part of IEC 60079 specifies the requirements for the design, construction, testing and marking of electrical Ex Equipment and Ex Components with Type of Protection increased safety "e" intended for use in explosive gas atmospheres.

Electrical Ex Equipment and Ex Components of Type of Protection increased safety "e" are either:

Level of Protection "eb" (EPL "Mb" or "Gb"); or

Level of Protection "ec" (EPL "Gc")

Level of Protection "eb" applies to Ex Equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; but not including semiconductor devices or electrolytic capacitors.

NOTE 1 The fundamental basis of "eb" is limitation of temperature, and reduced likelihood of insulation failure resulting in an arc or spark. Expected malfunctions of electronic components, such as semiconductor devices or electrolytic capacitors, can result in a failure producing excessive temperatures, or arcs and sparks.

Level of Protection "ec" applies to Ex Equipment or Ex Components, including their connections, conductors, windings, lamps, and batteries; and also including semiconductor devices and electrolytic capacitors.

NOTE 2 The use of electronic components, such as semiconductor devices or electrolytic capacitors, is permitted in Level of Protection "ec" as these are evaluated under both normal conditions and regular expected occurrences and are not likely to result in excessive temperatures or arcs and sparks. As the requirements for separation distances are not applied to the internal construction, commercially available electronic components are generally suitable if the external separation distances comply.

The requirements of this document apply to both Levels of Protection unless otherwise stated.

For Level of Protection "eb", this document applies to electrical equipment where the rated voltage does not exceed 11 kV ACRMS or DC.

For Level of Protection "ec", this document applies to electrical equipment where the rated voltage does not exceed 15 kV ACRMS or DC.

NOTE 3 Short circuit currents flowing through increased safety connections of mains circuits are not considered to create a significant possibility of ignition of an explosive gas atmosphere due to movement of connections as a result of mechanical stresses created by the short circuit current. Normally, the relevant industrial standards require that the effects of short time high currents on the security of connections be considered. The presence of the explosive gas atmosphere does not adversely affect the integrity of the connection.

NOTE 4 Any short term thermal excursions that occur as a result of electrical current excursions above normal rated currents, such as those that occur during the starting of motors, are not considered to create a significant possibility of ignition of an explosive gas atmosphere due to the relatively short duration of the event and the convection that occurs during the event.

NOTE 5 High-voltage connections and associated wiring (above 1 kV) can be susceptible to increased partial discharge activity that could be a source of ignition. Increased spacings to earthed surfaces or other connections and provision of suitable high-voltage stress relief for the terminations are typically provided.This document supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence.

Amendment 1

This part of IEC 60794-1 describes test procedures used to establish uniform requirements for mechanical properties of optical fibre cables when subjected to bending under tension. The purpose of this test is to determine the ability of an optical fibre cable to withstand bending around rollers or bows during installation, when a specified load is applied.

This document applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of both optical fibres and electrical conductors.

Throughout the document, the wording "optical cable" can also include optical fibre units, microduct fibre units, etc.

See IEC 60794-1-2 for general requirements and definitions and for a complete reference guide on test methods of all types.