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Follow this guide to replace the CMOS battery in your Lenovo ThinkPad T16 Gen 3 laptop.
The CMOS battery (sometimes referred to as the RTC/"Real Time Clock" battery) helps maintain system settings such as the date, time, and BIOS settings when your laptop is turned off. If these settings aren't being maintained between power cycles, you may need to replace the CMOS battery.
The Lenovo part number is 5B11M63536. This replacement part includes new pre-applied adhesive, but if yours doesn't, use thin, double-sided tape instead.
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Completely shut down your laptop (don't just put it in sleep mode) and disconnect all cables.
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Flip the laptop upside-down, and rotate it so the screen hinge faces towards you.
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Use a Phillips screwdriver to fully loosen the seven captive screws securing the base cover.
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Insert your fingernail or an opening pick into the gap between the base cover and keyboard deck, next to one of the screen hinges.
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Pry up the base cover until the clips unfasten.
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Grasp the base cover along the screen hinge edge and lift slowly to unfasten the remaining clips.
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Lift and remove the base cover.
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Use a Phillips screwdriver to fully loosen the two captive screws securing the battery connector.
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Lift the edge of the battery with the connector to disconnect it.
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Remove the battery
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Slide the plastic tabs on the long edge of the battery into their recesses in the frame.
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Lower the battery into place so the connector goes over its socket.
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Use your fingernails to grab on the lip located at the back of the CMOS battery connector, labeled "JRTC1."
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Unplug the connector from the motherboard.
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Insert the flat end of a spudger underneath the CMOS battery and pry it up to separate the adhesive securing it to the frame.
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Remove the CMOS battery.
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Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before you install it.
To reassemble your device, follow these instructions in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before you install it.
To reassemble your device, follow these instructions in reverse order.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
