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Introduction

If your Amazon Fire HD 8 12th Generation is experiencing accelerated battery drainage, prolonged charging times, or failure to charge altogether, you may need to replace the battery. You can resolve this issue by replacing the faulty battery with a new and fully functional one.

The battery in the Amazon Fire HD 8 12th generation typically provides a 13-hour lifespan before requiring recharging, featuring a 4750 mAh Lithium Polymer composition. It serves as the primary power source for all the device's functions and capabilities. Without a properly functioning battery, the device will not operate. Under normal usage conditions, your device's battery should last approximately 13 hours, with a charging time of around 5 hours for a full recharge.

Before initiating the battery replacement process, ensure your device is powered off, disconnected from any power supply, and detach the battery from the motherboard. This procedure requires tools such as spudgers, opening picks, and adhesive for securing the new battery in place.

What you need

Step 1 Rear Case

Amazon Fire HD 8 Plus 12th Gen Battery Replacement, Rear Case: step 1, image 1 of 2

Amazon Fire HD 8 Plus 12th Gen Battery Replacement, Rear Case: step 1, image 2 of 2

Unplug the charger, power down the device, and remove the SD card before beginning.
Insert an opening pick into the seam between the rear case and the screen assembly.
Slide the opening pick around the perimeter, prying periodically, until the screen assembly begins to release.
Insert an opening tool into the gap you created, and continue to pry periodically around the entire perimeter until the screen assembly fully releases.
Be patient and don't pry too hard in any specific place. Excessive force may cause damage to the device.

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Step 2

Remove the rear case.

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Step 3 Amazon Fire HD 8 Plus 12th Gen Battery Disconnection

Amazon Fire HD 8 Plus 12th Gen Battery Replacement, Amazon Fire HD 8 Plus 12th Gen Battery Disconnection: step 3, image 1 of 1

Use an opening tool to lift the battery connector until it disconnects.

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Step 4 Battery

Amazon Fire HD 8 Plus 12th Gen Battery Replacement, Battery: step 4, image 1 of 1

Gently and slowly grip and pull the three white adhesive tabs that secure the battery until they fully release.
The adhesives are marked with a black flap with a white adhesive. You will know it has been successfully removed when you can move the battery around.

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Step 5

Amazon Fire HD 8 Plus 12th Gen Battery Replacement: step 5, image 3 of 3

Gently pry around the entire perimeter of the battery with an opening tool until the adhesive releases.
Remove the battery.
Take care not to bend or puncture the battery while prying the battery.
Clean under the old battery and insert a new battery with adhesive to ensure the battery stays in place.

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Conclusion

To reassemble your device, follow these instructions in reverse order. Make sure you have a applied a adhesive for the new battery to make sure it stays in place.