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As i want to lit 10 Watt led from 6V battery. Thanks in Advance and really need your valuable advice.
If this is your requirement, you don’t have to step up the DC.
10 watt is the Power rating. Remember the equation, Power = Voltage * Current.
The Voltage of the LED must be less than 2V, but it require very high current to glow brightly. So all you have to do is to use a very good quality battery and connect the LED with a resistor in series.
The value of the resistor can be calculated using the equation,
Resistance = Voltage / Current.
If this resistance is greater than the internal resistance of the battery that you are using (you can get from the datasheet) then you can directly connect the LED.
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