PC power supply suppliers print the max amp output for each voltage on the label. 200 watt power supply usually gives you about 8 amps on the 12 volt line. 15 amps on the 5 volt line. My 600 watt PC PS has 25 amps on the 12 volt line.
Keep in mind that PC PS give out highly regulated 12 volts on the 12 volt line, most standalone PS give you 14 volts "no load" even if they say 12v, then the voltage can fall down to 10 volts when you're using the PS, but that's mostly the cheaper power supplies, high quality one will keep the voltage steady. I've seen one with 18 volts "no load" and it ruined a charger. Also keep in mind that a lot of chargers tend to false peak the batteries if the voltage is too low.
Last edited by andsetinn; 10-29-2004 at 02:15 AM.