I am using the teensy3.6 with teensy propshield. I am using the battery supply for power up the teensy.
Teensy is waking every three hours for taking few readings and going back to sleep for battery savings purpose. I am using here the snooze library to keep the teensy in sleep mode. I am facing the issue of random restart and random wake up earlier than predefined time. I came to know that restart issue due to low voltage by reading the reset source status register, but it is not happened every time but it happened randomly. Same the issue is happening for wake up problem but here in wake up pattern is fixed. In day it is waking up early at least one time. I am not able to find the solution.
Kindly share the solution or some idea which can lead to the solution.

Thanks and Regards,