BS IEC 60095-6:2019

1   Scope

  This part of [IEC 60095](/search?q=IEC%C2%A060095)
   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”. 
The batteries within the scope of this document 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 where
  there is no need to support 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 are 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
  from these additional properties, these batteries need to crank the ICE and support
  the lighting and also auxiliary functions in a standard operating mode with the support
  of the alternator when the internal combustion engine is switched on. All batteries
  within this scope fulfil basic functions, which are tested under the application of
  [IEC 60095‑1](/search?q=IEC%C2%A060095%E2%80%911). 
This document specifies the general requirements...