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Not at all important - only balance counts in how the bat feels

Both weight and pick up are equally important in how the bat feels to me

Weight is more important than balance in how the bat feels to me

[sachin200]

My unscientific answer is the 10 percent increase in your  normal  bat weight would enable the ball to be hit  further if the bat is swung at the same speed as your normal bat weight and there is no loss of timing but if a slower swing is used due to increase in bat weight it will not.
Therefore your normal lighter bat would hit the ball further due to your bat speed being faster.

I fully agree with this. Have any of you read this scientific article?
http://www.physics.usyd.edu.au/~cross/cricket.html

[Seniorplayer]

I fully agree with this. Have any of you read this scientific article?
http://www.physics.usyd.edu.au/~cross/cricket.html

No but will do  my post was based  on common sense.