Introduction
Use this guide to replace the battery cover in a Xiaomi Mi 9T Pro or Xiaomi Redmi K20 Pro smartphone.
Before disassembling your device, be sure the battery is charged below 25%. If accidentally punctured or damaged, the battery can catch fire and/or explode; if discharged below 25%, the chances of fire/explosion is decreased. Additionally, make sure that your phone is powered off before beginning the disassembly process.
Follow the iOpener Heating guide for instructions on using the iOpener.
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Insert and gently push the SIM card ejector tool (or an unfolded paperclip) into the small hole on the left side of the top edge of the phone.
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Press gently to eject the SIM tray.
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Remove the SIM card tray from the device.
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Use a heat gun to lightly heat the edges of the back to soften the adhesive that connects the back cover to the rest of the frame.
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Apply a suction cup to the lower portion of the phone's backing and pull firmly to create a crack between the back cover and the rest of the phone.
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Insert a Jimmy tool, opening pick, or plastic card under the edge of the back cover.
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Use a plastic card or Jimmy tool to slice around the phone's seam, cutting through the adhesive.
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To reassemble your device, follow these instructions in reverse order.
