Samsung Galaxy S26 Ultra Battery Replacement
This repair is necessary when your Samsung Galaxy S26 Ultra suffers from rapid drain, sudden shutdowns under heavy loads, or rear panel lifting caused by a swollen cell. Replacing an aged battery restores factory performance and battery longevity. Expect a process that requires applying controlled heat to separate the rear glass and carefully detaching internal shield brackets.
Required Tools
- Heat gun or thermal heating pad
- Heavy-duty suction handle
- Plastic opening picks
- Phillips #00 precision screwdriver
- ESD-safe plastic spudger
- Precision tweezers
- Pre-cut rear glass adhesive gasket
- Replacement Samsung Galaxy S26 Ultra battery
Step by step
- 1
Step 1: Power Down and Prep the Device
Discharge the battery below 25 percent to minimize thermal runaway risks if the pack is punctured.
Turn the phone completely off and remove the S Pen along with the SIM card tray.
- 2
Step 2: Heat the Rear Glass
Warm the perimeter of the back glass using a heat gun set to 80°C (175°F) for two to three minutes to loosen the factory adhesive.
- 3
Step 3: Separate the Perimeter Adhesive
Place a suction handle near the lower edge, lift gently to create a seam, and insert a plastic pick.
Slide the pick around the edges while keeping insertion depth shallow near the camera assembly to protect internal flex cables.
- 4
Step 4: Remove the Back Glass
Carefully lift the back panel away from the frame and set it aside.
Clean any remaining degraded adhesive residue from the mating surfaces.
- 5
Step 5: Remove the Wireless Charging Bracket
Unscrew the Phillips #00 screws holding the top midframe bracket and integrated wireless charging coil.
Lift out the bracket assembly to expose the motherboard connectors.
- 6
Step 6: Disconnect the Battery Connector
Pry the battery flex connector straight upward from the motherboard using a plastic spudger.
Avoid metal tools to prevent short circuits on the motherboard.
- 7
Step 7: Detach Interconnect Flex Cables
Unseat the main motherboard-to-daughterboard and display interconnect cables running directly over the battery compartment.
Gently bend the cables out of the removal path.
- 8
Step 8: Release the Battery Pull Tabs
Lift the plastic release tabs at the edge of the battery pouch.
Pull the tabs steadily at an upward angle to lift the battery free from the chassis without puncturing the cell.
- 9
Step 9: Position the New Battery
Peel any protective backing from the replacement battery adhesive, lower the cell into the frame alignment slot, and press gently on the edges to set the bond.
- 10
Step 10: Reconnect Internal Components
Reattach the interconnect ribbon cables, reconnect the battery terminal to the motherboard, and reinstall the wireless charging bracket with its original screws.
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Step 11: Perform a Functional Test
Power on the phone temporarily to ensure the display operates and the device accepts a charge, then power it off before final assembly.
- 12
Step 12: Reseal the Rear Cover
Apply a fresh pre-cut adhesive seal along the outer perimeter of the frame, place the back glass down evenly, and apply firm, uniform pressure for two minutes to seal the phone.
Disclaimer: repairs are done at your own risk. Devices contain batteries and live components; improper handling can cause injury or fire. For a safe, warrantied repair, contact us.
Prefer to leave it to the pros?
Frequently asked questions
No, breaking the factory adhesive compromises the original IP68 depth rating. Applying a fresh pre-cut adhesive provides dust and splash resistance, but the device should not be submerged.
Charge the phone continuously to 100 percent and leave it connected to the charger for at least two additional hours. Then use the phone normally until it powers off automatically at zero percent, followed by an uninterrupted charge back to 100 percent.
Stop applying heat immediately and never use sharp or metal tools to pry it. If a battery swells, work slowly using the pull tabs and store the removed cell in an airtight, fire-safe container before taking it to a battery recycling facility.
No, reused adhesive loses its structural grip and creates gaps that allow dust and moisture into the chassis. Always remove old adhesive cleanly and install fresh pre-cut tape.
When to Choose DIY Repair vs. Professional Electronic Device Repair?
Our free repair guides help you troubleshoot simple issues at home. Whether you want to know how to handle minor software glitches or basic maintenance, we provide step-by-step instructions. However, complex tasks like an iPhone screen replacement, battery replacement, or fixing a device that won't charge often require specialized tools and expertise.
Expert Phone Repair in Ljubljana and Maribor
If you are facing severe hardware issues—such as water damage, a laptop overheating, or an electric scooter that won't turn on—it is safer to rely on professional technicians. KRON Servis is your trusted partner for phone repair Slovenia, offering reliable services in two major cities: phone repair Ljubljana (Vilharjeva cesta 29) and handy reparatur Maribor (Zagrebška cesta 83a).
We specialize in a wide range of services, including laptop repair, computer service, PS5 and gaming console repair, TV repair, and household appliance servicing. We use OEM parts to ensure the highest quality, and every repair comes with a 12-month warranty. Diagnostics are priced at €30 including VAT.
Check our pricing page for details, track your repair status online, or reach out to us directly via our contact page for professional assistance.