Is one sinful for restoring the battery of a phone that fell from him if the owner of the phone used his phone in a wrong way?

Assisting in sin is a sin, according to the Almighty's saying: "And do not cooperate in sin and aggression." However, handing a phone back to its owner after it has fallen is not, because the phone is used for good and permissible things, and offering assistance to its owner is considered a good deed that entails reward and charity, like helping a man with his mount and a kind word.