Every model comes with a different size battery, and it also depends on the type of charger you use. A small battery, like the 70.7-kWh unit in the EQB, takes around eight hours to charge on a Level 2 home station, or 32 minutes with a DC fast charger. The 108.4-kWh battery in the flagship EQS SUV takes 13 hours on a 240V outlet, or 31 minutes to hit 80% on a fast charger.