For a trip to Sorrento and the Amalfi Coast, we recommend renting a gas scooter, as the distance makes it infeasible to reach there from Naples on electric.
A little suggestion
Don’t plan to visit the entire coast on a single day trip, it just won’t be enough time. Make smaller plans. For instance, Positano (You can park your scooters here https://goo.gl/maps/djnJbrPBib25b1Tv8) + Sorrento is doable on a single day but make sure to leave early (we are open from 9am). Amalfi is a lot farther away than Positano, at about 1 hour drive from there. If you like hiking, check out the Punta Campanella trail. Easy, not too crowded, and perfect for sunset.
You will be able to get to Sorrento and the Amalfi Coast and back on a single charge.