Laptop CMOS/RTC Battery CR2032 for IBM 08K8216 FRU 92P0986


1 in stock

Code: WIT5213

Key Features

Part Description: IBM – Cmos / Resume / RTC Panasonic CR2032 with Cable 2 pin (Rechargeable)
Part Number : IBM P/N 08K8216 , FRU 92P0986
Warranty: 30 Days (1 Month) 

MRP:৳ 500.00

1 in stock


This is a IBM  CR-2032 CMOS/RTC Lithium Battery. Its Part Number is 08K8216 and its FRU is 92P0986. This item is new and has never been used. They were originally bulk packaged for OEM distribution and we have re-packaged them for individual sale. It is being sold as pictured and does not include any additional accessories or parts.

Product Code: WIT5213 Categories: , Tags: , , , , , ,


Determining compatibility with your existing parts, hardware, and/or software is the sole responsibility of the buyer. Every effort has been made to ensure the accuracy of all information contained in this items description. Prime Electronic Components can not possibly anticipate compatibility with all equipment available on the market today. Please visit the manufacturer’s website or call their customer service for more detailed technical information and for compatibility questions. If you do not understand the item offered or do not have the technical knowledge to use or install the item; please do not purchase this item. Most information is available on the internet or from the manufacturer’s website, do not assume compatibility; know before purchasing.

Article About CMOS

What Is CMOS and What Is It For?

CMOS (complementary metal-oxide-semiconductor) is the term usually used to describe the small amount of memory on a computer motherboard that stores the BIOS settings. Some of these BIOS settings include the system time and date as well as hardware settings.

Most talk of CMOS involves clearing CMOS, which means to reset the BIOS settings to their default levels. This is a really easy task that’s a great troubleshooting step for many types of computer problems. See How to Clear CMOS for several ways to do this on your computer.

A CMOS sensor is different – it’s used by digital cameras to convert images into digital data.

Other Names for CMOS
CMOS is sometimes referred to as Real-Time Clock (RTC), CMOS RAM, Non-Volatile RAM (NVRAM), Non-Volatile BIOS memory, or complementary-symmetry metal-oxide-semiconductor (COS-MOS).

How BIOS and CMOS Work Together
The BIOS is a computer chip on the motherboard like CMOS except that its purpose is to communicate between the processor and other hardware components like the hard drive, USB ports, sound card, video card, and more. A computer without a BIOS wouldn’t understand how these pieces of the computer work together.

See our What Is the BIOS? piece for more information on the BIOS.

CMOS is also a computer chip on the motherboard, or more specifically a RAM chip, which means it would normally lose the settings it’s storing when the computer is shut down. However, the CMOS battery is used to provide constant power to the chip.

When the computer first boots up, BIOS pulls information from the CMOS chip to understand the hardware settings, time, and anything else that’s stored in it.

What Is a CMOS Battery?
The CMOS is usually powered by a CR2032 cell battery, referred to as the CMOS battery.

Most CMOS batteries will last the lifetime of a motherboard, up to 10 years in most cases, but will sometimes need to be replaced.

Incorrect or slow system date and time and loss of BIOS settings are major signs of a dead or dying CMOS battery. Replacing them is as easy as swapping out the dead one for a new one.

More About CMOS & CMOS Batteries
While most motherboards have a spot for a CMOS battery, some smaller computers, like many tablets and laptops, have a small external compartment for the CMOS battery that connects to the motherboard via two small wires.

Some devices that use CMOS include microprocessors, microcontrollers, and static RAM (SRAM).

It’s important to understand that CMOS and BIOS are not interchangeable terms for the same thing. While they work together for a specific function within the computer, they are two entirely different components.

When the computer is first starting up, there’s an option to boot into BIOS or CMOS. Opening the CMOS setup is how you can change the settings it’s storing, like the date and time and how the different computer components are first started up. You can also use CMOS setup to disable/enable some hardware devices.

CMOS chips are desirable for battery-powered devices like laptops because they use less power than other types of chips. Although they use both negative polarity circuits and positive polarity circuits (NMOS and PMOS), only one circuit type is powered on at a time.

The Mac equivalent to CMOS is PRAM, which stands for Parameter RAM.

by  Tim Fisher

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