It is worth remembering that 3.0V lithium batteries are supported and that PMIC_VSNSV voltage range is 2.4 - 3.6V. When [[FAQs_(Axel)#Q:_How_to_enter_RTC_mode.3F|Axel Lite enters RTC mode]] and 3V3VIN voltage is removed, typical current absorption from PMIC_LICELL pin is about 135uA. This value is '''relatively high''' with respect to the typical lithium coin cell battery capacity (10 - 50mAh). It is recommended that system integrator verify that expected battery lifetime satisfies system requirement. If not, the use of an external low-power RTC device should be considered.