Introduction

Follow this guide to replace a dead or worn-out battery in your HMD Pulse Pro smartphone.

Your phone's lithium-ion battery has a limited lifespan. If your phone dies quickly and doesn't hold a charge, it may be time to replace the battery.

If your battery is swollen, take appropriate precautions.

What you need

Step 1 Prepare your phone for disassembly

HMD Pulse Pro Battery Replacement, Prepare your phone for disassembly: step 1, image 1 of 1

Let your phone's battery drain below 25% before starting this repair. A charged lithium‑ion battery may catch fire if damaged.
Unplug all cables from your phone and completely power it down.

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Step 2 Remove the SIM card tray

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HMD Pulse Pro Battery Replacement, Remove the SIM card tray: step 2, image 3 of 3

Firmly press a SIM eject tool, bit, or straightened paper clip into the SIM card tray hole on the left edge of your phone until the tray ejects.
Remove the SIM card tray.
During reassembly, use the tray's markings to orient and reinsert it properly.

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Step 3 Separate the back cover

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HMD Pulse Pro Battery Replacement, Separate the back cover: step 3, image 2 of 2

Insert the tip of an opening pick between the back cover and frame, at the SIM card tray cutout.

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Step 4

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Position the opening pick straight down and slide it along the left edge to begin unclipping the back cover.

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Step 5

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Continue sliding the pick around the perimeter of your phone until the back cover is fully unclipped.
The corners can be tricky to unclip and may take some force. If you're having trouble, try prying up with the pick.
Don't try to fully remove the cover yet, as a delicate cable still connects it to your phone.

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Step 6

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Carefully flip your phone over so the back cover is facing up.
Lift the back cover off the frame and flip it over the left edge of your phone, laying the cover flat on your work surface.
Be very careful not to strain the back cover's delicate cable.
During reassembly, place the back cover onto the frame and firmly squeeze around the perimeter to reengage all the clips.

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Step 7 Remove the motherboard cover

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HMD Pulse Pro Battery Replacement, Remove the motherboard cover: step 7, image 2 of 2

Tool used on this step:

Tweezers

$4.99

Buy

Be very careful not to puncture the battery with your screwdriver.
Use a Phillips screwdriver to remove the nine 3.6 mm‑long screws securing the motherboard cover.
The screw near the center of the top edge is covered by a sticker. Pierce through it with your screwdriver, or use tweezers to remove it.

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Step 8

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Insert an opening pick between the right edge of the motherboard cover and frame.
Twist the pick to fully unclip the cover.

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Step 9

Remove the motherboard shield and its connected graphite sheet.
During reassembly, set the motherboard shield into place and press down firmly around the perimeter to reengage the clips.

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Step 10 Disconnect the battery

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HMD Pulse Pro Battery Replacement, Disconnect the battery: step 10, image 2 of 2

Use the flat end of a spudger to pry up and disconnect the battery press connector from the bottom edge of the motherboard.
To reconnect these type of connectors, align the connector over its socket and press down with your fingertip—first at one side, then the other—until it clicks into place. Don't try to force the connector into place, or you may permanently damage it.

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Step 11 Remove the back cover

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HMD Pulse Pro Battery Replacement, Remove the back cover: step 11, image 2 of 2

Use the flat end of a spudger to pry up and disconnect the back cover press connector from the bottom edge of the motherboard.

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Step 12

Remove the back cover.

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Step 13 Remove the battery

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Be very careful not to bend, crease, or puncture the battery during the next few steps. A damaged battery can leak dangerous chemicals and catch fire.
Use your fingers to carefully peel the three plastic tabs from the left side of the battery.

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Step 14

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With one hand, fold the clear outer tabs out of the way of the battery and firmly hold them down to secure the frame.
If you're having trouble with the tabs, you can fold them under the phone and tape them to the screen.
With your free hand, grip the green center pull tab and pull straight up to fully separate the battery adhesive.
Lay the battery over the right edge of your phone.

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Step 15

Use your fingers to peel the battery's plastic film from the frame.

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Step 16

Tool used on this step:

Tweezers

$4.99

Buy

Remove the battery and its film.
During reassembly:
Never reuse a deformed or damaged battery, as it's a potential safety hazard. Replace it with a new battery.
Use a spudger and tweezers to peel up and remove the two pieces of battery adhesive.
Apply the new adhesive to the frame and remove the plastic liners.
Firmly press the battery into its recess so the cable is on the top edge and the three tabs are on the left edge.