# \[Hilo\] Why would I need to keep RTC?

**URL:** <https://forum.sierrawireless.com/t/hilo-why-would-i-need-to-keep-rtc/6621>\
**Category:** HL Series FAQ\
**Created:** [July 24, 2013, 6:21am UTC](https://forum.sierrawireless.com/t/hilo-why-would-i-need-to-keep-rtc/6621 "2013-07-24T06:21:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![FAQ\_Poster](https://avatars.discourse-cdn.com/v4/letter/f/f9ae1b/32.png) [@FAQ\_Poster](https://forum.sierrawireless.com/u/FAQ_Poster)\
**Post date:** [July 24, 2013, 6:21am UTC](https://forum.sierrawireless.com/t/hilo-why-would-i-need-to-keep-rtc/6621/1 "2013-07-24T06:21:39Z")

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Answer: You would need to add a Back Up to keep time in the module. In some network the time information is send through GPRS in this case this Back Up battery is useless.  
Please refer to “Hilo Application Note.pdf”