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cell phone charger


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- I know and i really have good understanding about the input ac source, frequency and output voltage..But i dont understand Wheres the 100mA & max 750mA come up? Can u give me some idea & mathematical explanation to come up for 100mA & 750mA.. thanks
- How can i compute the power rating of these charger??

INPUT AC. 120~240
50-60 hz
Output DC. 4.8-12
max 750mA

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