Also Fits: IC-F3161 (DT/T/DS/S), IC-F4161 (DT/D/DS/S). Japanese cells. IP68 rated. Certified by SGS to TIA-4950 / CSA C22.2 No. 157 / UL 913 5th Edition standard for intrinsically safe use (Class I, II, III / Division 1 / Groups C-G / -20° C to 40° C, T3) and non-incendive use (Class I, II, III / Division 2 / Groups A-G / -20° C to 40° C, T3).