Enersys Cyclon Monoblock Lead acid 4v 2.5Ah Battery.
Brand: Enersys
Voltage: 4v
Capacity: 2.5Ah
Dimentions: 77mm Long x 70 High x 43 Wide
Equivalent: 0819-0010
Enersys now manufactures these cyclon batteries, previous brands that used to manufacture these batteries include, Gates Energy, Hawker Energy.