Is it dangerous to leave a cellphone charger plugged in without the cellphone?

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Unplug and conserve

Unless it is defective, it is not dangerous to leave a phone charger plugged in an electrical outlet. But the transformer and circuit within the charger still draw current and dissipate a small amount of heat, so it is considered wasteful of electricity (and thereby damaging to the environment) to leave it plugged in when it is not charging a cell phone.

First answer by ID3680058512. Last edit by Schnazola. Contributor trust: 1962 [recommend contributor]. Question popularity: 30 [recommend question]

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