Why is the battery draining?

When I fully charge my Macbook 2010 Unibody White to 100%, the battery starts draining every minute. Within an hour, it has only 67% of charge left. This is a new battery which has only 4 cycles. I checked everything on my MacBook and found out that the CPU is hot at 85 degrees Celsius. Is there something wrong with the CPU which is causing the battery to drain or is there something wrong with the battery.

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Where did you source the battery from?

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I sourced the battery from Apple

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My MacBook has 2gb of Ram, 2.4ghz Intel Core 2 Duo and a 250gb SSD

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