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Hi, Kenneth: The milliamp output is the second most important of three things needed to replace a missing power supply to your equipment. Voltage is the first, and the power supply's output power plug shape is the third. The milliamp rating on the power supply determines if the power supply will be strong enough to run your equipment. So if the equipment you have needs 12v 400mA (or four tenths of one Amp) then look for a power supply that has 12V AND 400mA or greater mA, along with the matching output plug for the equipment you have. Please note there are different plug sizes and shapes that exists, so the plug at the end of the power supply is very important. Make sure the voltage matches. Do not attach a 5V piece of equipment to a 12V power supply as it will destroy your equipment. Follow these guidelines, and you will be ok. -Tech1
Sorry, there was a problem. Please try again later.Other websites have indicated this power supply Casio - AC Adapter Power Supply - Black Model: CAS AD12M (Best Buy SKU: 9279161) is rated at 12VDC 1.5Amps. This is equivalent to 1,500 milliamps (one thousand, five hundred mA). Be cautious in your selection of power supplies. Voltage is very important to observe. If too high, such as the 9V equipment in the other comment, the voltage will overheat and destroy the equipment faster than you can unplug the power supply. This is why the DC output plug sizes of the power supplies are different. The manufacturers are trying to protect equipment not rated to use their power supplies as best they can. This website also has a chat line where folks like Fernando can help. Just click on the "Questions" tab sticking out the right side. He gave me their customer service telephone number to safely do online Best Buy purchasing without fear of my credit card being compromised with viruses as hard-to-detect Key Logger that watches quietly in some laptops as a result of clicking affected emails or pictures. For added security, obtain the phone number yourself from their chat line. -Tech1
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