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What type of transformer is used in a phone battery charger and its ratings?
Wiki User
∙ 6y ago
Usually these "wall wart" chargers are small switching regulated power supplies, not Transformers. A transformer may be part of the switching regulator circuit, but it is only one small part of it.
The ratings of the switching regulated power supply will vary with different types of phones, but are always printed on a label on the "wall wart" casing. Read the label.
Wiki User
∙ 6y ago
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