There should be enough charge on the battery to start it without the power adapter, but it's a good idea to plug it in anyway, to be sure. It shouldn't affect the MBP either way.
You should fully charge your macbook on initial charge after you open it. you should also do full charge/discharge cycles (3-4) to get the battery going 100%
You should fully charge your macbook on initial charge after you open it. you should also do full charge/discharge cycles (3-4) to get the battery going 100%
Li-Ion/Li-Polymer batteries do not need to be cycled (except to reset the battery monitoring circuit - and even then, once is enough), and deep cycling should be avoided. See here:
Unlike nickel and lead-based batteries, a new lithium-ion pack does not need cycling through charging and discharging. Priming will make little difference because the maximum capacity of lithium-ion is available right from the beginning. Neither does a full discharge improve the capacity of a faded pack. However, a full discharge/charge will reset the digital circuit of a 'smart' battery to improve the state-of-charge estimation.
have to admit, in my excitement i forgot about plugging it in first time & got cracking straight away with setting up the house wifi connection! tut tut. haven't noticed any reduction though, i'm happy with the charge i get now. don't worry about it. i like to give it full charge from nearly flat (right after the message appears about it running on reserve power) if i'm taking it out with me.
The battery on the bottem of the Macbook Pro and the Macbook has an indicator that lets you know the charge - anything more than a single light will be more than enough for the initial set up that runs.