Temperature dependence of the reaction rate coefficient for reaction NH₂⁺ + H₂ → NH₃⁺ + H. The present data obtained using normal H₂ (pentagons) and para-enriched H₂ (diamonds) are compared to values obtained in normal hydrogen by Rednyk et al. (2019); Kim et al. (1975); Adams et al. (1980). The Langevin capture rate coefficient k_L, the calculated value by Mohandas et al. (2020), and the present values in the KIDA and UMIST databases are indicated by lines (see legend for explanation of the symbols). The Arrhenius Kooij fits of the present data are indicated by lines with 1σ confidence bands.