... the weight of lead-acid batteries3)Environment-frendly, green battery: do not contain any heavy metal, rare metal, ... no pollution, accord with European ROHS standard, it is a green battery.4)superior in safety: non-explosive in short circuit, ... : ≤3% of norminal capacity /month.Specification: 36V/24AH BATTERY PACKNorminal voltage: 36VNorminal capacity: 24ahCapacity difference: ≤50mahEnd voltage of ...