ah..the answer was..yeah it wont do above 300mA 
 
the 3.6 mean... 
 
12v x 0.3 or something..making 3.6...heers the post 
 
"That's the maximum power (watts) you can draw. 
 
Power = amps x volts 
 
At your maximum voltage setting (12V), and maximum current (300mA, or 0.3A) then the power drawn is 12 x 0.3 = 3.6 VA (watts) 
 
ie. No matter what voltage you are using, do not draw more than 300mA AND do not draw more than 3.6 watts"