Also Fits: NX220, NX320, NX420, NX3220, NX3300, NX3320, NX3400, NX3420, TK2140, TK2160, TK2170, TK2360, TK3140, TK3160, TK3170, TK3173, TK3360. Japanese cells. IP64 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, T3C) and non-incendive use (Class I, II, III / Division 2 / Groups A-G / -20° C to 40° C, T3C).