Common knowledge about pacemakers, a pacemaker is a prime example of modern technology used for disease treatment. Nowadays, pacemakers are made with sophisticated technology, have excellent functions and are available in a wide variety. The type of pacemaker a patient needs to have is determined first and foremost by the patient’s condition, not by how expensive the pacemaker is. For example, a young patient with conduction block would be better off with a dual-chamber pacemaker, while an elderly patient with less activity may be sufficient with a single-chamber ventricular pacemaker; some patients with sick sinus node syndrome may be fitted with an atrial single-chamber pacemaker if atrioventricular conduction is normal, but only with a single-chamber ventricular pacemaker if the patient has atrial fibrillation. In addition, the price of the same type of pacemaker may vary from manufacturer to manufacturer, and it cannot be said that the expensive one is necessarily the best. Generally speaking, pacemaker batteries have an expiration date. For heart patients, a slow heartbeat is often a danger signal and requires a little external power to make the arrested heart beat again. This disease requires pacemaker implantation, otherwise, the patient will die suddenly at any time over time. How can you tell if a pacemaker is expiring so that you can avoid life-threatening conditions? The key is to regularly check the battery usage of the pacemaker. The battery that provides power to the pacemaker can only be used for a one-time period, generally speaking, the life span of a pacemaker is 5-8 years. However, the battery life is closely related to the patient’s dependence on the pacemaker – the higher the dependence and the more frequently the pacemaker works, the faster the battery is consumed and the shorter the life of the pacemaker. Patients themselves can determine whether the pacemaker battery is about to run out by some symptoms, such as weakness, shortness of breath, dizziness or even fainting, which indicate that the battery is close to exhaustion and should be seen by a hospital in time. If the pacemaker is approaching the end of its service life, even if the patient does not feel any abnormalities, he/she should go to the hospital regularly (usually every 1-3 months) to have the pacemaker programmed and checked to prevent the problem before it happens.