Dead batteries and leaky tires lead to pricey service calls. See how the best jump starters with air compressors performed in our hands-on tests.

However, given their different sizes and the full-electric drivetrain, there’s no full-size spare included, so owners must rely on a ‘tyre mobility set’ comprising tyre sealant and a 12-volt air ...

They tested whether aiming for a lower number—below 120 mm Hg—would bring better results. The study was called the Effective Systolic Pressure Reduction Intervention Trial, or ESPRIT.