The Triplett Model 37-66 3.6V Lithium (Li-SOCI2) Battery for use in utility metering, automatic meter reading, alarms and security devices, tollgate systems, memory back-up, computer real-time clocks, tracking systems, automotive electronics, and professional electronics. The 37-66 has 1/2 AA size bobbin cell for easy integration into compact sytems. The 37-66 features high energy density with low self-discharge and stainless steel container/end caps for superior resistance to atmospheric corrosion. The 37-66 is stable during most of the lifetime of the application. UL component recognition. Includes package of 2.