[BrianG]

The cost for the charger itself would be more expensive, yes, but not really once you figure in the cost of a safe/proper external PS. The more advanced user can make a high current supply using server parts or whatever, but not the average Joe. Putting two of those server supplies in series for 24v has to be done a special way to be safe, and even then, it's not the way they are intended to be used.

To boost sales for those "high-end" chargers would simply be a matter of marketing. Show a price comparison of individual components vs the more expensive (and safer) included PS model and even ordinary people will quickly see the advantages. And people like Jerry2kone, who want a proper, manufacturer-designed supply will be satisfied.

Also, how many hobbyists have you seen get confused by what supply they need? I've seen numerous threads around various forums where people try to use a low current 12v supply and wonder why their charger errors out and/or won't have full output. Putting the supply in the charger is safer and will have the necessary rating required. No more guesswork.