New battery is bad - why?

I bought a new battery for my 3 year old MacBookPro.  I am a teacher and only use my computer for the Internet, Word, Netflix, etc.  This battery is dying within 8 hours but 6 of those hours are in stand-by - meaning I use my computer for 2 hours and leave it disconnected from a power source for 6 hours and it is in the red.  It is identical to my old battery!!
When I bought the new battery, I followed the protocol and fully charged it, then let it drain, then fully charged it...
Should I make an appt at an Apple Store?  Or, am I doing som

Please follow these steps and paste the resulting screen image into this thread so that we can help diagnose your battery issue.
From the Apple Menu Choose About This Mac.
On the next window click More Info…
On the next window click System Report…
On the left side should be a list. Highlight Power.
Use SHIFT-COMMAND-4 and copy this screen
Upload the resulting capture to this forum using the Camera symbol in the forum software. The screenshot should be named Screenshot with the date and time.
Here is a sample report:

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