Hyundai’s electric car Ioniq 5 has bi-directional charging, which allows owners to power electronic devices from the car battery. Conventional car batteries can be used to charge laptops and smartphones only and drain quickly if plugged into anything more powerful — portable fridge, sound system etc. The car comes with the option to install a solar-panel roof to charge the battery, giving the EV an additional driving range of about 1,300 km annually.