A low-battery alert means your ICD’s battery is approaching the end of its life. The device emits a warning sound periodically, usually at the same time of day, so you may notice it as a regular daily beep.
This warning typically begins three to six months before the battery is depleted, so it is not an emergency. Contact your ICD clinic so they can check the device and plan a replacement, known as a generator or box change.
Our ICD sounds and alerts page explains the common alert types in more detail.