IEC 61011-2:1990

Applies to battery-operated electric fence energizers not for connection to the supply mains. Examples of such appliances are electric fence energizers -operated by non-rechargeable batteries either incorporated or separate; -operated by separate accumulators only; -intended to be connected to a battery charger not designed for connection to the supply mains; -incorporating a dry battery or an accumulator which can only be recharged when removed from the energizer.