David...if you are really worried...buy one of these.
Wavecom 0~30V, 0~5A, Constant current or constant voltage mode. Can set current to a limit and it will not draw past that limit. $129.
Yes they are more than you require but the beauty of this is that you can set your voltage and limit your current. For that price...its as cheap or cheaper than cheap supplies.
Yes it doesn't have battery backup..but if used at home this is not an issue.
Brendan