One nice thing about a key , you can alway hide a spare key somewhere just in case you lose or lock your keys inside the truck
you can't lock a smart key in the truck...the car knows when the key is in the vehicle and won't let you "lock your keys in the car"...but yes, you could still lose it.
when the battery died in my Rio5 fob (all lower case now, you guys happy?
), i simply removed the physical key that is hidden within the fob itself (similar to how VW does it), opened my door, and held the fob to the start button and pressed start (it can somehow sense it that way)...i think went to the Kia dealer on the way to work (hoping the issue with the fob was simply a dead batter)...new battery for $3 and good as new.