This is a normal behavior of the battery after using it. The ring is equipped with a lithium-polymer (LiPo) battery, which naturally degrades over time. As a result, at some point, the maximum charge capacity may be limited, reflecting the battery's actual wear.
However, if you notice this immediately upon receiving your ring, please reach out to the support at https://www.circular.xyz/contact-us
Updated on: 17/10/2025