# Off the Grid

**URL:** <https://community.purpleair.com/t/off-the-grid/119>\
**Category:** Sensors\
**Created:** [October 15, 2021, 4:31pm UTC](https://community.purpleair.com/t/off-the-grid/119 "2021-10-15T16:31:47Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![pjbryer](https://sea2.discourse-cdn.com/flex020/user_avatar/community.purpleair.com/pjbryer/32/3389_2.png) [@pjbryer](https://community.purpleair.com/u/pjbryer)\
**Post date:** [August 26, 2023, 3:00am UTC](https://community.purpleair.com/t/off-the-grid/119/17 "2023-08-26T03:00:07Z")

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I’m cross-posting this from: [Battery packs for Indoor Sensors - #5 by pjbryer](https://community.purpleair.com/t/battery-packs-for-indoor-sensors/4244/5).

I have purchased an Aluratek 20,000mAh battery and get about 50 hours on my Flex sensors.

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_[View the full topic](https://community.purpleair.com/t/off-the-grid/119)._