Eneloops would only last about 3 weeks. And disposable last 2 months. This door is used a lot and since it has Zwave and a door open sensor it sends info on every open.
Bonus, since it can handle the lipo AA batteries that put out 1.8v and it gives the motor more oomph I made the battery pack give 7.2v and it never sticks anymore.
This is a garage-door so its not critical access but is used a lot.
But you can lock the handle and leave without keys.
You can leave the handle unlocked, and just use the deadbolt this way.
This is how I have locked my house for the last like 100 years without a smart deadbolt.