Lithium battery's life expectancy for the XBTGT and XBTGK is:
- 10 years when the battery's ambient temperature is less than or equal to 40 deg C (104 deg F)
- 10 years when the unit's ambient temperature is less than or equal to 25 deg C (77 deg F)
- Approximately 60 days, with a fully charged battery
- Approximately 6 days, with a 10% charged battery