Some basic battery safety practices from the UK: https://www.gov.uk/government/news/take-charge-of-battery-safety-when-using-e-cigarettes
If your vaping device did not come with a charger (USB charging adapter) then only use a high quality adapter from a well known company (Anker, Samsung, Apple, etc.) that has a high enough current rating to charge your device. Typically, a 2A rating is enough but check the instruction manual for your device to be sure.
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