Compatible replacement battery — cross-reference Dantona part COMP-65 — Lithium, Lithium Thionyl Chloride (ER/TL/LS) chemistry Replaces / cross-references: 15-5903-21500, 6ES7971-0BA00, Interstate LIT2375, LIT2375, PS405, PS407, S7-400, SIMATIC S7-400 Application: CMOS/BIOS Compatible with Interstate equipment Check voltage, capacity and connector against your original battery before ordering Dantona COMP-65. Chemistry: Lithium, Lithium Thionyl Chloride (ER/TL/LS). Application: CMOS/BIOS. Cross reference: 15-5903-21500, 6ES7971-0BA00, Interstate LIT2375, LIT2375, PS405, PS407, S7-400, SIMATIC S7-400, SL-360, SL-760, TL-5903, TL-5903/S. Verify voltage, capacity and connector type against your device's original battery. Non-rechargeable primary cells must not be charged.