This International Standard specifies requirements and test methods for batteries and battery chargers intended for use with electrically powered wheelchairs. It is applicable to lead acid batteries and chargers intended for use with them. Requirements for chargers are applicable to those with a rated input voltage not greater than 250 V a.c. and a nominal output voltage not greater than 36 V. NOTE 1 Requirements for other battery chemistries (nickel and lithium based batteries) and suitable chargers are under consideration. NOTE 2 Requirements regarding safety are applicable to all battery chargers intended for use with electrically powered wheelchairs.