X230 Best Battery Life

Hi, I've been looking around for a laptop with the best battery life on the market and I've read the ThinkPad x230 ( http://www.lenovo.com/products/us/laptop/thinkpad/x-series/x230/ ) has a quite high battery life, I was wondering how to achieve that, on this site here; http://blog.laptopmag.com/all-day-strong-longest-lasting-notebooks it says it can achieve even up to 20 hours and 46 minutes with a 9 cell battery and sheet batteries, so I've looked around for the 9 cell battery on your website and I found out it can be ordered with the laptop or separately so that's not a problem but the problem is with the battery sheet, as far as I am aware, the only one that supports the inbuilt battery is the 6 cell battery sheet here http://support.lenovo.com/en_US/product-and-parts/detail.page?&LegacyDocID=MIGR-76758 but I am still unsure how it all works, if I got the 6 sheet cell battery along with the 9 cell battery with the laptop would they somehow combine their battery life and work as one and when I charge the battery sheet would it charge both of the batteries and indicate the level of both on the battery sheet? will it really achieve 20 hours of battery life without me having to change any settings in the laptop to draw power from another power source (if i left the laptop on and unattended)? I'm really looking forward to buying this laptop if the batteries join and work as one and can get up to 20 hours of battery life.
Solved!
Go to Solution.

By looks and personal observation it is a slice battery. but it is called an external battery, not sure why. It is exactly the same thing as a slice battery.
The two batteries together should get a high number of hours. I am not sure of exact hours though. with a light load as you have said I'm sure it will not die for some time. Exact hours are hard to determine without testing it. Unfortunately I don't have a slice battery.
I think it will be a great tool for traveling. It is light, fast and has a long battery life.
I hope this helps,
Alex
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I got my refurbished MBP 13" mid 2010 model two Friday's ago (July 16) from the Apple online store and I have some questions about the battery life....
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EDIT: Forgot to say I have the 2.4ghz 250gb model.
Message was edited by: trsohmers

My MBP has been plugged in and fully charged for the past 2 hours and everything listed here has been the same, and here is some information in coconutBattery:
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