The LTE Record logs all the CDMA sites you are connected to while you were connected to LTE. It is believed that your device uses the LTE Records to optimize scan for LTE. For instance, your phone logs a CDMA site in the record every time it connects to LTE. And when you connect to that CDMA site again, your device then knows it is in a LTE area, and increases the frequency it scans for LTE.
Therefore, battery life is not reduced when you are not connected to CDMA sites not reflected in your LTE Record. Because when you are not connected to a CDMA site associated with LTE, your device scans for LTE much less often. Like every 30 minutes. Presumably it scans for LTE at the same rate as EVDO when you are connected to a CDMA site that is in your LTE Record file.
Robert