Hard to assess. If the charger uses a high frequency switching power supply = you may be strangely sensitive? One easy solution is to place the charging battery

Hard to assess. If the charger uses a high frequency switching power supply = you may be strangely sensitive? One easy solution is to place the charging battery in a metal box = a Faraday Shield or cage. This block radiated energy. The power cord must go through a gap n the lid, but 99% of the radiated energy will be blocked(depends on whatever gap you leave) - one assumes normal AC line radiation is not a problem as it has not happened before. https://en.wikipedia.org/wiki/Faraday_cage https://en.wikipedia.org/wiki/Faraday_cage