How to Replace a CMOS Battery for the ThinkPad 600E
All modern computers require a Complementary Metal Oxide Semiconductor (CMOS) chip even when the machine is not in use and when the power is off. The chip retains hardware configuration settings for the computer, boot order settings as well as date and time information.
The CMOS battery allows the chip to retain these important settings for your computer when no other power source is available. A CMOS battery is like any other battery type and eventually requires replacement. Replace the CMOS battery in your ThinkPad 600E if you constantly need to reset the hardware or time and date settings for the laptop.
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Things You'll Need
- New CMOS battery for ThinkPad 600E (Lenovo Part Number: FRU 02K6502)
- Phillips #00 screwdriver
Instructions
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1
Shut down the laptop and turn off the power to the unit. Remove the AC adapter and any other connected cables.
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2
Remove the retaining screw in the memory slot cover. Remove the cover and set it aside.
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3
Locate the small ribbon cable and connector attached to the CMOS battery tray. The CMOS battery itself resembles a nickel or silver colored coin. Gently remove the battery connector by prying it off with a screwdriver.
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4
Pull the CMOS battery tray out and remove the battery.
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5
Insert the CMOS battery into the tray and close the tray door. Reconnect the battery connector to the CMOS battery tray.
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6
Replace the memory slot cover and tighten the screw.
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7
Plug in the AC adapter. Press the power button the computer while holding the "F1" key to enter the BIOS setup utility and update the hardware and time settings. Continue to press the "F1" key until the setup screen appears.
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Tips & Warnings
The CMOS battery for a ThinkPad 600E is a lithium battery and can cause an explosion, a fire or severe burns if not properly handled. Never attempt to recharge the battery, remove the polarized connector or disassemble it. Also, never expose the battery to temperatures greater than 212 degrees Fahrenheit. Only use a Lenovo approved CMOS battery for the ThinkPad laptop.
