A 5V 1A charger can charge the battery full in 2-3 hours. The time might be longer if you use a smaller charger. We recommend charging it during the night time when you sleep, thus there won’t be any inconvenience.
Note: the S1 should be charged with a 5V charging plug, typically found in mobile phone chargers or USB interfaces on computers. It is strongly advised not to use the charging plug from a laptop, as it can cause damage to the S1 device.
