The charging indicator light is not on when charging
Check USB cable and adapter whether they are working well.If it's still in malfunction and within 6 months warranty, you can ask for warranty from the store where you purchased it/SMOK US warranty center(if you are in the US)/us (submite a claim at :https://www.smoktech.com/sign-in?r=/after-sales/channel).Thanks for your feedback.
The service time is lower than standard time after full charge
Battery agingThanks for your feedback.
Never be fully charged or always showing charging when plugged
mod faultThanks for your feedback.