The iMac does have a lithium-ion battery, but it’s not the same kind of battery that you find in iPhones, iPads, or other portable Apple devices. The iMac uses a small internal lithium-ion battery that helps power the real-time clock (RTC) and maintain certain settings when the computer is turned off or unplugged.
This battery is responsible for keeping the date and time accurate, as well as storing other essential information like network settings, display preferences, and startup disk selection. It ensures that even if you disconnect your iMac from power or experience a power outage, you won’t lose these important settings.
Unlike the batteries in portable devices, the iMac’s RTC battery is not easily replaceable by the user. It is a small, coin-shaped battery that is soldered onto the logic board inside the iMac. If the battery needs to be replaced, it is recommended to take your iMac to an authorized service provider or an Apple Store.
I haven’t personally had to replace the RTC battery in my iMac, as it has been running smoothly without any issues. However, I have heard from others who have had their iMac’s RTC battery replaced during routine maintenance or when experiencing issues with their computer’s clock or settings.
The lithium-ion battery in the iMac serves an important function in preserving crucial settings and ensuring accurate timekeeping, even when the computer is powered off or unplugged.