[hwillis]

If you have two 1000 mAh cells connected in series, they will provide 1 amp for 1 hour. The battery is still 1000 mAh even though it is made of two cells with 2000 mAh total.

You are equating amp-hours with watt-hours, which is not reasonable. Q is charge, and is only proportional to a number of electrons. E is the energy, or a number of electrons at a voltage.

> When having 13 batteries of 29000mAh, or 29Ah, you have 13 x 29 = 377Ah or 377000mAh

By this logic, with those cells in series the whole battery would be at 48 volts and 337 amp-hours, giving it a storage of 18.1 kWh. That's despite being made of 13 cells with only 107 watt-hours each.