FMB965 not switching to internal battery when external voltage decreases slowly.
Under about 9.2V FMB965 stop working even if internal battery is 100%.
last record from database:
+--------+---------------------+---------------+------------------+
| pid | tracker_cet | battery_level | external_voltage |
+--------+---------------------+---------------+------------------+
| 127327 | 2024-09-01 21:07:40 | 100 | 9202 |
+--------+---------------------+---------------+------------------+