Hi
@Carolrita! Welcome to our little corner of the DIS!
Although it's been a few years since I rented from Walker (like some other folks around here, I have my own
ECV that I travel with), here's a few tips that might help - regardless of the vendor!
First of all - and I can't stress this enough -
charge your battery overnight, every night. A rental ECV should be able to go all day at WDW if it is properly and fully charged overnight. The exception to this is if a customer needs a larger size (bariatric) unit, and tries to "get by" with an undersized unit, the battery will drain faster because it is under a greater strain than it is designed for. Make sure the ECV you rent is the right size for you!
It's important to have the office hours & availability of your mobility vendor at hand. (Prior to owning my own ECV, I would make an address book or contacts entry in my phone for any mobility vendor I would rent from, so that I could access the number easily. In the "Notes" area, I would include information like office hours, and ask them about emergency after hours information.)
Do take the time to ask the vendor what their current after-hours policy is regarding an emergency - like if the unit stops working altogether (but the battery was charged) or if the battery won't hold a charge at all. Most of the time you will know if there is a problem well before they close the office for the day, but rarely, an ECV will fail later in the evening. If it should happen, find a Cast Member, tell them you need assistance (you may have to ask for a Manager to come help) and then leave a message for the vendor, and follow any emergency instructions they have given you.
Some people will confuse the *cosmetic condition* of the scooter with it's ability to perform. Rental scooters do receive a lot of abuse at the hands of either new users, or careless users ("It's not mine, so I don't care!") and often this shows in the cosmetic condition of the scooter - scuffs, scrapes, broken plastic covers, ripped seats, etc. As long as the unit *performs* - meaning it runs all day on a full charge, and gets you around safely - don't worry about how it looks.
Last, but not least, snap a couple of photos of the ECV when it is dropped off (both sides of the unit) and keep your paperwork safe somewhere besides the scooter. Just like when you rent a car, you want to be able to prove the condition the unit was in when it was delivered to you. Make sure that the battery is fully charged when it is dropped off (it should be) and that the charger is with the unit.
And go have fun!