Complex sentence: A severe production shortfall of 100 kWh battery packs limited the second quarter of 2017 global deliveries to just over 10,000 Model X vehicles, with a slight increase to 11,865 vehicles during the third quarter of 2017.
Split into simpler sentences: A severe production shortfall of 100 kWh battery packs limited the second quarter of 2017 global deliveries to just over 10,000 Model X vehicles. With a slight increase to 11,865 vehicles during the third quarter of 2017.