All,

I have a Teensy 3.2 with a soldered crystal and when powered via usb it seems to store and display correct time.

I have a 3 volt batter + connected to the VBAT and ground connected to GND (the pin next to pin 0 NOT the pin at the end of the board). Both GND's appear to be connected.

I can program the time, but upon disconnect of power (either USB or by power at 3.3 PIN), the programmed time is not stored. Upload the attached code where I have a setTime with arbitrary time. then comment the setTime upload and see how time is not stored.

How to persist time using setTime?

Code:
#include <TimeLib.h>

time_t RTCTime;


void setup() {

  Serial.begin(9600);
  setSyncProvider(getTeensy3Time);

  // setTime(hr,min,sec,day,month,yr);

  //  comment and see if saved data sticks--it will not, so how do you save dates and time?
  setTime(3, 3, 3, 8, 19, 2019);

}

void loop() {

  Serial.print(hour());
  Serial.print(":");
  Serial.print(minute());
  Serial.print(":");
  Serial.print(second());
  Serial.print(" ");
  Serial.print(day());
  Serial.print("/");
  Serial.print(month());
  Serial.print("/");
  Serial.print(year());
  Serial.println();

  delay(1000);

}

time_t getTeensy3Time() {
  return Teensy3Clock.get();
}