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Samsung Galaxy S25 Ultra Battery Replacement

Battery Replacement guide for the Samsung Galaxy S25 Ultra

Moderate
~53 min
25 steps

Before you begin

Tools

  • Heat gun or hair dryer
  • Suction cup tool
  • Plastic prying tools
  • Precision screwdriver set (Phillips #00)
  • Spudger tool
  • Tweezers
  • SIM eject tool

Parts / materials

  • Replacement Galaxy S25 Ultra battery
  • Battery adhesive removal strips
  • Pre-cut rear glass adhesive gasket
  • 90%+ Isopropyl alcohol

Safety

  • Disconnect the battery before touching motherboard connectors to prevent electrical shorting.
  • Do not puncture, flex, or heat the lithium-ion battery directly.
  • Wear safety glasses to protect your eyes when handling hot glass and solvents.
  • Keep isopropyl alcohol away from hot tools and open flames.

Overview

# Samsung Galaxy S25 Ultra Battery Replacement Repair Guide Action-specific battery replacement walkthrough for the Samsung Galaxy S25 Ultra. About 53 minutes across 25 steps. This DIY guide walks through battery replacement on the Samsung Galaxy S25 Ultra (Galaxy S series phone). Before you open the device, confirm the exact model number on the Samsung settings screen or rear housing so your replacement part matches the Galaxy S25 Ultra specifically—not a similar Galaxy S sibling. Most DIY techs finish this Samsung Galaxy S25 Ultra battery replacement in about 53 minutes when parts and tools are ready. Difficulty is rated intermediate for this model. Recommended tools for this Samsung Galaxy S25 Ultra job: Heat gun or hair dryer, Suction cup tool, Plastic prying tools, Precision screwdriver set (Phillips #00), Spudger tool, Tweezers, SIM eject tool. Parts and supplies: Replacement Galaxy S25 Ultra battery, Battery adhesive removal strips, Pre-cut rear glass adhesive gasket, 90%+ Isopropyl alcohol. Power the Galaxy S25 Ultra off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Samsung Galaxy S25 Ultra, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle battery replacement for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Eject SIM Tray and S Pen

    1 min

    Insert a SIM eject tool into the hole on the bottom edge to remove the SIM tray, then push and release to withdraw the S Pen.

  2. 2

    Heat the Rear Glass

    3 min

    Apply a heat gun set to low along the rear glass edges for 3 minutes to soften the perimeter adhesive.

  3. 3

    Attach Suction Cup

    2 min

    Place a suction cup near the bottom edge of the back cover and pull upward gently to form a small gap.

  4. 4

    Insert Opening Pick

    1 min

    Slide a thin plastic opening pick into the gap created between the rear glass and the metal frame.

  5. 5

    Slice Bottom Adhesive

    2 min

    Slide the pick carefully along the bottom edge to cut through the factory adhesive layer.

  6. 6

    Slice Left Edge Adhesive

    2 min

    Guide the pick around the bottom-left corner and slide along the left side of the device.

  7. 7

    Slice Top Edge Adhesive

    2 min

    Move the pick along the top edge, keeping insertion depth under 3 mm to protect internal sensors.

  8. 8

    Slice Right Edge Adhesive

    2 min

    Slide the pick down the right edge of the frame to finish separating the back panel.

  9. 9

    Remove the Rear Glass

    2 min

    Lift the rear glass cover free from the chassis and place it on a clean surface.

  10. 10

    Unscrew Upper Motherboard Bracket

    3 min

    Use a Phillips #00 screwdriver to remove the screws holding down the upper wireless charging assembly.

  11. 11

    Disconnect Wireless Charging Coil

    1 min

    Use a spudger to gently pop off the wireless charging coil press connector from the motherboard.

  12. 12

    Remove Wireless Charging Assembly

    2 min

    Peel up the wireless charging pad and attached graphite shield sheet from the battery area.

  13. 13

    Disconnect the Battery Cable

    1 min

    Pry the battery connector directly up from its motherboard socket using a plastic spudger.

  14. 14

    Unscrew Lower Loudspeaker

    2 min

    Remove the Phillips #00 screws securing the bottom speaker assembly to the housing.

  15. 15

    Remove Loudspeaker Module

    2 min

    Pry up and lift out the loudspeaker module to reveal the main ribbon cables underneath.

  16. 16

    Disconnect Interconnect Flex Cables

    2 min

    Unplug the main display and sub-board interconnect ribbon cables from both ends.

  17. 17

    Apply Isopropyl Alcohol

    3 min

    Drip a small amount of high-concentration isopropyl alcohol into the gaps around the battery perimeter.

  18. 18

    Pull Battery Tab

    3 min

    Grasp the battery pouch release tab firmly and pull steady straight upward to peel the battery free.

  19. 19

    Remove Old Battery

    1 min

    Lift the degraded battery out of the frame cavity and store it safely for recycling.

  20. 20

    Clean Battery Well

    2 min

    Remove residual adhesive glue from the well using isopropyl alcohol and a clean lint-free wipe.

  21. 21

    Apply Battery Adhesive

    2 min

    Place new pre-cut battery adhesive strips into the cleaned recess in the aluminum housing.

  22. 22

    Install New Battery

    2 min

    Align the replacement battery over the adhesive strips and press down firmly to secure it.

  23. 23

    Reinstall Interconnect Cables and Loudspeaker

    3 min

    Reconnect the flex cables, position the bottom loudspeaker module back into place, and resecure its screws.

  24. 24

    Reconnect Battery and Wireless Coil

    3 min

    Attach the main battery press connector, reinstall the wireless charging coil assembly, and fasten its screws.

  25. 25

    Reseal and Close Rear Glass

    4 min

    Apply a fresh adhesive gasket around the frame edge, firmly press the back glass down, and reinsert the SIM tray and S Pen.

After your Samsung Galaxy S25 Ultra battery replacement

Power the Galaxy S25 Ultra back on and test the battery replacement function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S25 Ultra job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.

Keep learning

Explore more Samsung Galaxy S25 Ultra repair context in the encyclopedia, or open related DIY guides.

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