ETSO-C142b

Non-Rechargeable Lithium Cells and Batteries

1 Applicability

This ETSO provides the requirements which non-rechargeable lithium cells and batteries that are intended to provide power for aircraft equipment, including emergency systems, that are designed and manufactured on or after the effective date of this ETSO must meet in order to be identified with the applicable ETSO marking.

This ETSO is not applicable to coin or button cells that contain less than 2 watt-hours (Wh) of capacity, and that is are compliant with the requirements of UL 1642 and the UN transport regulations.

2 Procedures

2.1 General

The applicable procedures are detailed in CS-ETSO, Subpart A.

2.2 Specific

None.

3 Technical Conditions

3.1 Basic

3.1.1 Minimum Performance Standard

RTCA document DO-227A ‘Minimum Operational Performance Standard (MOPS) for Non Rechargeable Lithium Batteries’ from 21 September 2017, as amended by Appendix 1 to this ETSO.

3.1.2 Environmental Standard

Non-rechargeable lithium cells and batteries must be tested according to RTCA document DO-227A Section 2.0 unless otherwise specified by Appendix 1 to this ETSO.

3.1.3 Software

See CS-ETSO, Subpart A, paragraph 2.2.

3.1.4 Airborne Electronic Hardware

See CS-ETSO, Subpart A, paragraph 2.3.

3.2 Specific

3.2.1 Failure Condition Classification

See CS-ETSO, Subpart A, paragraph 2.4.

4 Marking

4.1 General

See CS-ETSO, Subpart A, paragraph 1.2.

4.2 Specific

Each lithium cell or battery must be marked in accordance with RTCA document DO-227A, Section 2.1.10.

In addition, the non-rechargeable lithium cell, battery or end item must be marked as ETSO-C142b-X as described in the following table:

X	Cell, Battery or End Item
– 1	Cell
– 3	Battery
– 5	End Item
– 7	< 5 Wh within End Item Cells and batteries must meet at a minimum UL1642 and UN 38.3 certification. (see Note below)

Note: For ETSO-C142b-7 approvals, the ETSO marking must be on the End Item. The cell or battery within the End Item must be part marked and identified as a component within the End Item. The cell or battery must have a notation in the manufacturer’s documentation that the cell or battery is not to be used in another End Item unless it is tested separately in the new End Item. The End Item is required in order to meet the requirement of this ETSO, and the configuration control documentation must state that the cell or battery is approved based solely on the fact that it is tested and validated within the approved End Item. Only cells or batteries that are approved under the ETSO-C142b End Item article may be used. Cells or batteries should only be used if they are approved by the manufacturer of the article. If a different cell or battery is to be used with this End Item, the manufacturer must submit a new ETSO application (for the End Item) to EASA.

5 Availability of Referenced Documents

See CS-ETSO, Subpart A, paragraph 3.

[Amdt ETSO/3]

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