The motherboard battery is used to record the time of the computer system, that is, to maintain the accuracy of the system clock. When the power is insufficient, the time will return to the factory date, which is also to record the hardware information to be used when booting, that is, to maintain the BIOS information of CMOS.
At present, the battery of ordinary microcomputer motherboard is generally CR2032, which can't be charged during our use. The package or battery body of CR2032 indicates that lithium battery or lithium refers to lithium compound battery, not lithium ion battery, but the latter can be charged.
Extended data
CR2032 battery:
Lithium-manganese battery is named according to IEC standard. Where C- represents a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode, R- represents that the battery is cylindrical, and if it is square, F replaces it; 20 indicates that the battery diameter is 20mm, and 32 indicates that the battery height is 3.2 mm ..
This kind of battery is often used in computer motherboard CMOS batteries, other memory functions or power-off protection modules, electronic scales, calculators, electronic dictionaries and other products. The shelf life of CR2032 is usually 5 years. If the manufacturer's manufacturing level is not high or quality control is not good, its life will be greatly shortened.