4-in-1 Multi-Charger / Discharger / Extension Cord / Adapter Q :  How long can it be fully charged?   A:   When using a 16A socket, it can charge about 20-25km per hour (about 3~3.5 kilowatt-hours), when using a 10A socket, it can charge about 10-15km per hour (about 1.7~2.2 kilowatt-hours). Due to different charging environments, there will be certain errors in the AC-DC conversion efficiency of the vehicle, and the actual charging power shall prevail.   Q:   Can it be used outdoors in rainy days?   A:    Yes, when the charging module and the multi-functional extension cord are used in combination, the protection level of the product can reach IP55. However, the common household power strip/extension board does not have the function of anti-rain and anti-theft. It is recommended that you use it in a safe indoor environment.