electronvolt

Non-SI unit of energy, eV ≈ 1.602 176 487 40 × 10 −19 J.
Source:
CODATA 2006
Green Book, 2nd ed., p. 75
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 971