it's written on the back of your MacBook, top center near the FCC and CE logo. Usually like this: Designed in Apple California. Assembled in China Model Number: A1260
Hmm... 1 hour = 60 minutes = 3600 seconds. Therefore, 0.001 C/s equals to 3.6 C/hour, n'est-ce pas? If the device consumes 26.3 mA then it lets through 0.0263 coulombs each second, i.e. 2840.4 coulombs (789 mA·h) during 30 hours.