Samsung Galaxy S21 Battery Replacement: Essential Tips and Techniques for a Long-Lasting Device

Preparation

• Begin with a clean workspace to keep parts organized and prevent dust from interfering with the device. Fully power off your Samsung Galaxy S21 and gather the necessary tools, as listed below.

Accessing the Battery Compartment

• Heat Gun or iOpener Tool: Gently apply heat to the back cover to soften the adhesive, which will make it easier to remove.
• Suction Cup: Place a suction cup on the back cover and lift gently. If needed, insert a plastic opening pick to help separate the back cover.
• Opening Picks: Work your way around the edges to carefully release the adhesive and clips, allowing access to the internal components. Take your time to avoid cracking the glass back.

Removing Internal Components

• Phillips Screwdriver: Use a PH00 screwdriver to remove the screws securing the wireless charging coil and the protective cover over the battery connector.
• Spudger Tool: Carefully disconnect the battery from the motherboard using a spudger. Handle all components with care to prevent damage to the delicate connectors.

Replacing the Battery

• Battery Adhesive Remover (or Isopropyl Alcohol): Apply a few drops of adhesive remover around the edges of the old battery to loosen it.
• Pry Tool: Gently lift the battery out once the adhesive has softened. Replace it with a new, compatible Samsung Galaxy S21 battery.
• Reconnect the new battery to the motherboard, securing it with the battery cover and screws.

Reassembling Your Device

• Place the back cover on and apply gentle pressure around the edges to secure it with any remaining adhesive. For a stronger hold, consider adding new adhesive strips.
• Secure the screws holding the internal components with a Phillips screwdriver, ensuring everything is in place.

Testing

• Power on your Samsung Galaxy S21 and check that the new battery charges and functions as expected.