We recommend the HeadONE to be attached/detached while it is powered up with the battery; please note that you may ﬁnd a warning sticker underneath the unit, which outlines these instructions.
When you insert the battery, the HeadONE will provide a force in the counter direction to ease in attaching/detaching. This will cause the HeadONE to rotate slightly in the opposite direction.
Please attach/detach HeadONE when it is powered up, and be sure not to over-tighten it when you do.
Don't hesitate to contact our customer support team with any questions, and we'll be more than happy to help!