Constrains on the electric charges of the binary black holes with GWTC-1 events Hai-Tang Wang, Peng-Cheng Li, Jin-Liang Jiang, Guan-Wen Yuan, Yi-Ming Hu and Yi-Zhong Fan Eur. Phys. J. C, 81 8 (2021) 769 Published online: 24 August 2021 DOI: 10.1140/epjc/s10052-021-09555-1