The CMOS battery is necessary for maintaining system information, such as settings, time and date. If you have a Lenovo S10 that periodically produces errors, such as losing the system time and date, or onscreen errors regarding the CMOS, you may need to replace the CMOS battery, a small round battery on the motherboard. Fortunately, this is a process that can be done inexpensively if you do the work yourself. You will need to access the motherboard, identify the CMOS battery and replace it with the same model of battery. Writer Bio
