usnbrendon's answer about the specs for a DC power source contains an all-too-common misunderstanding of the meaning of current and EMF (electro-motive-force), which we usually call "voltage". (Using the term "voltage" is a little inappropriate because a "volt" is a unit of measure of EMF rather than a term referring to EMF, free of the unit of measure chosen. Just like when we correctly say "current" rather than saying "amperage".)

But my comments above are *not* my complaint.
usnbrendon wrote "Current: .2 - 2.5 Amp (do not exceed this current rating)". The "do not exceed" instruction, when describing a current requirement is the serious misunderstanding. One can exceed the current requirements all one wants and no harm is done. The device *wants* a power source that is able to deliver the proper voltage with current high enough that it'll take a reasonable amount of time to, for example, charge a battery. If the current rating of the power source is, say, ten times the requirement, so what? The load will draw only as much current as it's able. A power source does not *force* more current. It's not like too much voltage, which is likely to damage the device.

On the flip side, if the power source is able to deliver only, let's say, half the current that the battery wants, then it'll take twice as long to charge the battery. Again, no harm done.

There is, though, one caveat to what I've said above. In some cases, when a load that requires a certain voltage and wants it at some minimum current, gets it at current that is too low ("too slow"), the insufficient power source might over-heat trying to deliver more current than it can.

The bottom line is that, if there is any problem at all with using a power source with a current rating that differs from what's stated on the device being powered, it's *not* when the source is able to deliver *more* current, it's when the source is able to deliver only much less. usnbrendon's answer about the specs for a DC power source contains an all-too-common misunderstanding of the meaning of current and EMF (electro-motive-force), which we usually call "voltage". (Using the term "voltage" is a little inappropriate because a "volt" is a unit of measure of EMF rather than a term referring to EMF, free of the unit of measure chosen. Just like when we correctly say "current" rather than saying "amperage".) But my comments above are *not* my complaint. usnbrendon wrote "Current: .2 - 2.5 Amp (do not exceed this current rating)". The "do not exceed" instruction, when describing a current requirement is the serious misunderstanding. One can exceed the current requirements all one wants and no harm is done. The device *wants* a power source that is able to deliver the proper voltage with current high enough that it'll take a reasonable amount of time to, for example, charge a battery. If the current rating of the power source is, say, ten times the requirement, so what? The load will draw only as much current as it's able. A power source does not *force* more current. It's not like too much voltage, which is likely to damage the device. On the flip side, if the power source is able to deliver only, let's say, half the current that the battery wants, then it'll take twice as long to charge the battery. Again, no harm done. There is, though, one caveat to what I've said above. In some cases, when a load that requires a certain voltage and wants it at some minimum current, gets it at current that is too low ("too slow"), the insufficient power source might over-heat trying to deliver more current than it can. The bottom line is that, if there is any problem at all with using a power source with a current rating that differs from what's stated on the device being powered, it's *not* when the source is able to deliver *more* current, it's when the source is able to deliver only much less.