Battery operated locks are like sensor faucets in rest rooms - the answer to the question no one asked. Is it REALLY that hard to use a key (or turn a faucet)?
No, its not that hard to turn a key-but you know that.
We had the Kwikset version for a couple of years where the locking mechanism electrically moved the deadbolt open and shut via battery when the correct combo was entered. The batteries lasted about three months or so, and it was easy to tell when that time was as it audibly slowed.
We currently have a Schlage version where the lock is electrically engaged when only the combo is entered and the movement of the lever (by the user) engages and opens the door, and then is disengaged seconds later and remains so by default-no moving of a deadbolt. The batteries last far longer....so much so, I've had them in for close to a year now and I should probably replace them just because.
The advantage about these kinds of electronic combo locks in normal use is that they can have multiple combinations and are programmable-I have one main code for my family, another code for my parents and inlaws, and temporary codes we give to neighbors or my wife's monthly cleaners. No multiple sets of keys to give out, no keys to get lost (especially good if you have younger kids). Any and all of these combinations can be changed quickly and simply, and are on a regular basis.
It works well and I believe it actually enhances normal everyday security with regular changing of combinations compared to a keyed lock with a similar level of security....and we all know locks keep honest people honest, and bad guys with enough time and determination will get in anywhere of course. (I do not and will not have the version that can be wifi and internet accessed however....no thank you.)