RTC CMOS battery for Lenovo

Lenovo FRU04W4118 is an RTC CMOS battery for compatible Lenovo systems. It powers the real-time clock and helps retain system time and settings while the computer is disconnected from its main power source.

It is listed for ThinkPad Edge E430, E431, E535, E445, E530, E530c, E531 and E545 models. Check that your system requires this specific Lenovo part; this is not a general-purpose laptop battery.

This replacement may be relevant if a supported computer loses its time or BIOS settings when disconnected from main power. It supports the clock and settings functions, rather than powering the computer during use. The catalogue identifiers are FRU04W4118 and OEM 04W4118.