The effect of the WGC condition on the maximal energy extracted from black holes E. Naghd Mezerji, J. Sadeghi and B. Pourhassan Eur. Phys. J. Plus, 137 10 (2022) 1145 Published online: 17 October 2022 DOI: 10.1140/epjp/s13360-022-03368-1