4 x LS14500 Li-SOCI2 3.6V AA Batteries. The battery has a high energy density and is marketed towards industrial use.
LS14500 Batteries - LS14500 Li-SOCI2 3.6V AA Batteries x 2
GRE-Energy 2Pcs LS14500 LS 14500 3.6V Lithium AA Battery for SAFT LS14500 Water Electricity Meter PLC Facility Equipment Spare Generic Battery
Saft LS14500 Li-SOCI2 Lithium Thionyl Chloride 3.6V AA Batteries x 10
Saft LS14500 Li-SOCI2 Lithium Thionyl Chloride 3.6V AA Batteries x 6
Saft LS14500 Li-SOCI2 Lithium Thionyl Chloride 3.6V AA Batteries *Long Expiry*
Saft LS14500 Li-SOCI2 Lithium Thionyl Chloride 3.6V AA Batteries x 2