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12v 1000mA means that the maximum output of that unit is 1000 milliamps at 12 volts.

12v 150 mA means that the maximum output of that unit is 150 milliamps at 12 volts.

So if you need 150 milliamps at 12v either will do. BUT if you need over 150 milliamps at 12v then you must go for the 1000 mA unit.

By the way there are 1000 milliamps in 1 amp.

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14y ago

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