TL;DR: spend the $19 to buy a real, big brand USB charger because they have more to lose than grey market no brand. Tragic. Probably cheap USB without mains is

TL;DR: spend the $19 to buy a real, big brand USB charger because they have more to lose than grey market no brand. Tragic. Probably cheap USB without mains isolation or maybe enough water dripped down length of cable and socket to create a circuit, because USB is supposed to be 5V DC. Watch these USB charger teardown horror-shows to further understand why it's rational to pay for proper, authentic CE+UL, high-low isolation and quality components (ie insulated tape in transformers): https://youtu.be/3Hdn0MuCK_0 https://youtu.be/3Hdn0MuCK_0 https://youtu.be/uRe9w5PKmsE https://youtu.be/uRe9w5PKmsE https://youtu.be/bNoGCdX1IdQ https://youtu.be/bNoGCdX1IdQ https://youtu.be/bmtW_oA1fRo https://youtu.be/bmtW_oA1fRo https://youtu.be/PKl6UJ57-2U https://youtu.be/PKl6UJ57-2U https://youtu.be/Ureg6RQVYS0 https://youtu.be/Ureg6RQVYS0