https://sierramadreresearch.zendesk.com/hc/en-us/articles/4404466009485-How-do-I-sit-without-feeling-the-battery-pack-being-pressed-against-my-back-

https://sierramadreresearch.zendesk.com/hc/en-us/articles/4404466009485-How-do-I-sit-without-feeling-the-battery-pack-being-pressed-against-my-back-

The Power Pack should fit in the arch of your back, right above your buttocks. If the battery causes any discomfort in the back while sitting, remove it and place it in your back pocket. We've tested this placement for the past five months and had no issue with it, not able to feel it.