The electronic sphygmomanometer can work with rechargeable batteries or with a 6V power adapter, but it needs to meet the working voltage of the sphygmomanometer.
If the blood pressure monitor can work at a minimum voltage of 4.5V, and use a 1.2V rechargeable battery to work, you need to install 3 batteries, and then try to make the power supply is still able to work, because the 4 batteries can be up to 4.8V. 6V power adapter can also be used to work.
Sphygmomanometer principle:
Electronic sphygmomanometer is the use of modern electronic technology and blood pressure indirect measurement principle of blood pressure measurement medical equipment. Electronic sphygmomanometer has arm, wrist, watch type; its technology has experienced the most primitive first generation (mechanical fixed-velocity exhaust valve), the second generation (electronic servo valve), the third generation (pressurized synchronous measurement) and the fourth generation (integrated airway) development.
The first-generation (mechanical fixed-velocity exhaust valve) technology, which is often considered less accurate due to the use of rubber valves that are prone to deterioration, has been phased out by mainstream manufacturers of electronic sphygmomanometers; electronic sphygmomanometers have become the primary tool for self-measurement of blood pressure in the home. Electronic sphygmomanometers are also increasingly being used in hospitals and other medical institutions.