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Introduction

If your Flydigi Apex 5 controller fails to turn on or loses power sooner than expected, the cause may be a failing battery. Batteries fail overtime as they are repeatedly charged and discharged from use. Follow this guide to replace the battery.

Before starting, consult the Flydigi Apex 5 Not Charging troubleshooting page to confirm that the battery is your controller's issue.

Warning: Lithium-Ion batteries can be a fire hazard. If the controller battery appears swollen, follow iFixit's guide on What to do with a swollen battery.

What you need

Step 1 Battery

Flydigi Apex 5 Battery Replacement, Battery: step 1, image 1 of 2

Flydigi Apex 5 Battery Replacement, Battery: step 1, image 2 of 2

Orient the controller so that its back is facing you.
Apply firm downward pressure to remove both the M3 and M4 back paddles.

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Step 2

Flydigi Apex 5 Battery Replacement: step 2, image 3 of 3

Turn the controller over so its front faces you.
Remove the D-pad by firmly pulling it away from the body of the controller.

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Step 3

Flydigi Apex 5 Battery Replacement: step 3, image 3 of 3

Remove the clear, magnetically-adhered faceplate of the controller by firmly pulling it away from the body of the controller starting from the edge of the faceplate.

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Step 4

Flydigi Apex 5 Battery Replacement: step 4, image 3 of 3

Remove the small cover from the rear of the controller by pushing it upward.
Remove the two 5.8mm screws behind the battery cover using a Phillips #0 screwdriver.

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Step 5

Turn the controller over so its front faces you.
Remove the six 10mm long screws from the front of the controller using a Torx T6 screwdriver.

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Step 6

Flydigi Apex 5 Battery Replacement: step 6, image 3 of 3

Insert the plastic opening tool between the top and bottom plastic controller molds, then pry until the two pieces separate.
Be careful not to fully separate the two pieces of the controller. There is a fragile ribbon cable connecting the two sides that must be carefully disconnected in the next step.

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Step 7

Flydigi Apex 5 Battery Replacement: step 7, image 3 of 3

Carefully remove the back paddle ribbon cable with the angled tweezers or spudger.

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Step 8

Flydigi Apex 5 Battery Replacement: step 8, image 3 of 3

Press a prong of each side of the angled tweezers under the lip of the power supply cable connector and pull the plastic connector out of its terminal.
Pull the power supply cable through the plastic cable guides.

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Step 9

Flydigi Apex 5 Battery Replacement: step 9, image 3 of 3

Optional: Drip isopropyl alcohol along the sides of the battery. Then rotate the controller to distribute the alcohol and dissolve the adhesive holding the battery to the mount
Pry up the battery with the plastic hook and pry tool.
Do not use sharp metal tools to pry the battery out. That action risks puncturing the battery.