International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference prEN 50342-6:201X
Title Lead-acid starter batteries - Part 6: Batteries for Micro-Cycle Applications
Project Number 22319
Abstract/Scope This standard is applicable to lead-acid batteries with a nominal voltage of 12 V, used primarily as power source for the starting of internal combustion engines (ICE), lighting and also for auxiliary equipment of ICE vehicles. These batteries are commonly called "starter batteries". Batteries with a nominal voltage of 6 V are also included within the scope of this standard. All referenced voltages have to be divided by two for 6 V batteries. The batteries under scope of this standard are used for micro-cycle applications in vehicles which can also be called Start-Stop (or Stop-Start, idling-stop system, micro-hybrid or idle-stop-and-go) applications. In cars with this special capability the internal combustion engine is switched off during a complete vehicle stop, during idling with low speed or during idling without the need of supporting the vehicle movement by the internal combustion engine. During the phases in which the engine is switched off, most of the electric and electronic components of the car have to be supplied by the battery without support of the alternator. In addition, in most cases an additional regenerative braking (recuperation or regeneration of braking energy) function is installed. The batteries under these applications are stressed in a completely different way compared to classical starter batteries. Aside of these additional properties, those batteries have to crank the ICE and support the lighting and also auxiliary functions in a standard operating mode with support of the alternator when the internal combustion engine is switched on. All batteries under this scope have to fulfil basic functions which are tested under application of EN 50342-1. This standard is applicable to batteries for the following purposes: • Lead-acid batteries of the dimensions according to EN 50342-2 for vehicles with the capability to automatically switch off the ICE during vehicle operation either stand still or moving (“Start-Stop”); • Lead-acid batteries of the dimensions according to EN 50342-2 for vehicles with Start-Stop applications with the capability to recover braking energy or energy from other sources. This standard is not applicable to batteries for purposes other than mentioned above. Remark: The applicability of this standard also for batteries according to EN 50342-4 is under consideration.
Committee stage


Current Stage code 3099
Current Stage code date 2014-03-04
Current Stage code deadline  
Deadline date for vote  


Order Voucher  


IEC Technical Body  
Reference Document  
Keywords Battery; Lead-acid; Starter; Cyclic; HEV
Note D135/C011: NWI approved * D145/C079: BT approved 9-months tolerance with automatic transfer into the New Audit System * 2014-03-04: Enquiry alloacted to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
3099 2014-03-04    
2020 2013-06-12    
1099 2009-05-01 2010-05-01  
1000 2008-06-03 2009-04-30  

Implementation Dates

date of Ratification (DOR) (1)  
date of Availability (DAV) (2)  
date of Announcement (DOA) (3) -
date of Publication (DOP) (4) -
date of Withdrawal (DOW) (5) -


Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.