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HP 15-ac142dx CMOS Battery Replacement

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Follow this guide to replace the CMOS battery in your HP 15-ac142dx 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.

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  1. HP 15-ac142dx CMOS Battery Replacement, Remove the battery: crwdns2935265:01crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 HP 15-ac142dx CMOS Battery Replacement, Remove the battery: crwdns2935265:01crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 HP 15-ac142dx CMOS Battery Replacement, Remove the battery: crwdns2935265:01crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Turn off your laptop and flip it upside down onto a flat surface.

    • Slide the battery lock tabs towards each other to unlock the battery.

    • Lift the battery from the center and remove.

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  2. HP 15-ac142dx CMOS Battery Replacement, Reassembly information: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • To replace the battery:

    • Align the new battery with the cut-out in the laptop.

    • Insert the battery into it slot until you hear a "click" indicating the battery is fully seated.

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  4. HP 15-ac142dx CMOS Battery Replacement, Disassemble the laptop: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Turn off your laptop and flip it over onto a flat surface.

    • Remove battery by sliding the battery lock.

    • Remove the 10 screws

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  5. HP 15-ac142dx CMOS Battery Replacement: crwdns2935265:04crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 HP 15-ac142dx CMOS Battery Replacement: crwdns2935265:04crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Flip your laptop back over and use an opening tool to pry the keyboard up from the bottom case.

    • Locate the motherboard battery.

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  6. HP 15-ac142dx CMOS Battery Replacement, Remove the battery: crwdns2935265:05crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 HP 15-ac142dx CMOS Battery Replacement, Remove the battery: crwdns2935265:05crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • These photos are of a different device, but the procedure is identical.

    • Use the tip of a spudger to pry the motherboard battery out of its socket.

    • To install a new battery, insert it into its slot and press down firmly.

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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.

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