Most lock manufacturers advise against using rechargeables in locks. The problem is that rechargeables have a very different usage pattern. They would look like they are almost full charge for a very long time and then drop off very quickly. For this reason all of the usual “low battery” warnings, including those built into the lock themselves, won’t report correctly when when rechargeables are used. And because it tends to be so inconvenient when a lock isn’t working, non-rechargeables are preferred.
https://www.schlage.com/en/home/faq.html?what-type-of-batteries-should-i-use
Undesirable Operation: At the end of life for lithium batteries there is a very steep discharge curve. This means that when the batteries do die there will be little or no warning, which increases the likelihood of a lockout condition where the mechanical backup key would need to be used. Alkaline batteries have a more gradual power discharge, so when they are at 20% life remaining, the lock can provide both Nexia alerts (on Nexia enabled devices) and local feedback (blinking red light) providing ample time (weeks) to change batteries before they’re at the end of their life.