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Why is 13" MBP battery _smaller_ with Touch Bar?  

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I was just comparing battery specs for the 2016 13" MacBooks Pro.  The Touch Bar version (4 Thunderbolt 3 ports) has a 49.2Wh battery while the Touch Bar-less version (2 Thunderbolt 3 ports) has a 54.5Wh.

Why would this be?

I would have thought the Touch Bar would require more battery, but maybe the electronics for it take up space, and they sacrificed the battery capacity for it?

Touch Bar 13" spec:  https://support.apple.com/kb/SP748?locale=en_US

Touch Bar-less 13" spec:  https://support.apple.com/kb/SP747?locale=en_US

 
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I would have thought the Touch Bar would require more battery, but maybe the electronics for it take up space, and they sacrificed the battery capacity for it?

I think you nailed it here. Touch Bar plus two extra Thunderbolt-3-capable USB-C ports in the same space ... something's gotta give.

 
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