Total cross-sections for electron capture process in He⁺(1s)−He(1s²) collision system obtained by the QMOCC method and compared with the experimental and theoretical data. Theory: results of the present study, with the 2-state case (black solid line) and 34-state case (red solid line), SC-AOCC results of Gao et al. (2018; orange dashed line), TC-AOCC results of Zhao et al. (2018; green dashed line), JWKB results of Barata & Conde (2010; pink dash-dotted line), CC results of Sakabe & Izawa (1991; green dash-dotted line), and 2SAsMO results of Hodgkinson & Briggs (1976; blue dash-dotted line). Experimental results: Hinds & Novick (1978; green filled diamond), Helm (1977; red filled circle), Hayden & Utterback (1964; orange filled inverse triangle), and Hegerberg et al. (1978; blue filled triangle).