Xiaomi 12S Ultra Battery Replacement Vienna
The 4860-mAh battery in the Xiaomi 12S Ultra loses around 20% of its capacity after four years. If your phone no longer makes it through the working day, or simply switches off in the cold — Reparo replaces the certified cell in Vienna for EUR 89. We refit it with full Turbocharge 67W support, 50W wireless charging is preserved, 6-month warranty, pickup service across all 23 Vienna districts and insured shipping for the rest of Austria.
Xiaomi 12S Ultra battery prices at a glance
Battery replacement
Fixed price complete, fitting included
- 4860 mAh rated capacity, just like factory
- 6-month warranty on cell and fitting
- 50W Qi wireless charging stays fully working
- Dangerous-goods shipping, UN3481 compliant
- Battery-health calibration via MIUI/HyperOS
Diagnostic check 25 EUR, waived on repair. Pickup service in Vienna included.
Typical battery problems on the Xiaomi 12S Ultra
- Your Xiaomi 12S Ultra no longer lasts a working day – you used to easily get 6-8 hours of screen-on time
- The phone suddenly shuts off at 25-35% remaining charge and only powers back on once plugged in
- During 67W charging you can feel the back of the Xiaomi 12S Ultra getting hotter than usual
- The battery percentage jumps in big steps (65% → 35% → 10%) instead of dropping steadily
- Wireless charging at 50W no longer works or only charges noticeably more slowly
- You can see a gap between the frame and the back cover: the classic sign of a swollen cell
- The Xiaomi 12S Ultra won't start again after a full discharge, even after a long charge
- MIUI/HyperOS shows a clearly reduced maximum capacity in the battery settings
How does the Xiaomi 12S Ultra battery replacement work?
- Battery diagnosis via MIUI/HyperOS + meter
MIUI/HyperOS settings → Battery → Health shows the capacity. Our voltage/impedance measurement at the battery module confirms the finding. Below 80% capacity or a cycle count above 500 we recommend a replacement.
- Open the back cover carefully
The Xiaomi 12S Ultra is opened with a special suction cup and a warmed adhesive edge. The back cover is lifted away gently, without warping the aluminium frame.
- Release the old battery
The battery cell is fixed to the aluminium frame with pull tabs. We loosen the adhesive strips with isopropyl alcohol 99 – never using a screwdriver as a lever.
- Fit a certified 4860-mAh cell
A new Li-polymer cell with identical capacity, 3.87 V nominal voltage and a precise form factor. Connector on the mainboard, adhesive on the frame, contact pressure controlled.
- Re-seal + gasket
Old adhesive film removed, new Xiaomi adhesive applied, back cover re-bonded under pressure. 30 minutes curing time.
- Full charge + calibration
First charge to 100% at 25 °C – MIUI/HyperOS re-calibrates the battery gauge to the new cell. We check battery health, 67W charging and 50W wireless.
Xiaomi 12S Ultra battery replacement – price, process and charging tech in Vienna
The Li-polymer battery in the Xiaomi 12S Ultra has 4860 mAh of capacity including 50W Qi wireless. After 500 to 700 full cycles the maximum capacity drops to 80% – reached after 2-3 years of daily use. MIUI/HyperOS shows you exactly where you stand under Settings → Battery → Battery health.
Reparo replaces the Xiaomi 12S Ultra battery in Vienna for EUR 89 fixed price. That is around 7% of the original launch price (EUR 1199). Included: a certified 4860-mAh Li-polymer cell, fitting, MIUI/HyperOS calibration and a 6-month warranty. If you also have screen damage: Xiaomi 12S Ultra screen replacement.
Xiaomi service vs. Reparo – what's the difference?
Authorised Xiaomi service centres in Austria charge 60-90 EUR for the battery replacement depending on the model – and only at certified partners that specialise in Xiaomi 12S Ultra service. Reparo charges EUR 89 – we use Xiaomi-compatible Li-polymer cells with the same cell chemistry and charge curve. All options for your device: Xiaomi 12S Ultra repair overview.
Frequently asked questions about the Xiaomi 12S Ultra battery replacement
Xiaomi battery replacement – what does it cost for the Xiaomi 12S Ultra in Vienna?
A Xiaomi 12S Ultra battery replacement costs EUR 89 fixed price at Reparo in Vienna. Included: a certified Li-polymer cell with 4860 mAh, MIUI/HyperOS calibration and a 6-month warranty. Diagnostic check 25 EUR, waived on repair. Pickup service in Vienna or send it in from anywhere in Austria.
What does the battery replacement cost for the Xiaomi 12S Ultra?
The Xiaomi 12S Ultra battery replacement costs EUR 89 fixed price at Reparo in Vienna. Included: a certified 4860-mAh Li-polymer cell, fitting, MIUI/HyperOS calibration, a 67W charge test and a 6-month warranty. Diagnostic check 25 EUR, waived on repair.
How long does the new Xiaomi 12S Ultra battery last?
With normal use the replacement battery lasts 500-700 full cycles with at least 80% capacity – roughly 2.5 to 3.5 years of everyday use. One full cycle equals a complete discharge from 100% to 0%. The warranty runs for 6 months on the cell and the fitting.
Is the 4860-mAh battery for the Xiaomi 12S Ultra a standard replacement or original?
We fit certified 4860-mAh battery cells built to Xiaomi original specification: 3.87 V nominal voltage, identical capacity, the same charge curve. Original Xiaomi service packs are only available through authorised Xiaomi service centres. Our cells measurably last just as long.
Does 67W Turbocharge work on the Xiaomi 12S Ultra after the replacement?
Yes. The 67W Turbocharge electronics sit on the Xiaomi 12S Ultra's mainboard, not in the battery. Our replacement cell supports the full charge protocol and charges with original Xiaomi adapters in the same time as before. The cell chemistry is designed for high-current charging.
Does 50W wireless charging stay working on the Xiaomi 12S Ultra after the battery replacement?
Yes. On the Xiaomi 12S Ultra the Qi charging coil sits under the back cover on a separate assembly, not on the battery. During the battery replacement we open the back cover – the wireless coil stays untouched. 50W wireless works after the replacement just as before.
My Xiaomi 12S Ultra is bulging at the back – is that dangerous?
Yes, potentially. A swollen battery has built up gas pressure (the cell chemistry is at the end) – a fire and explosion risk, especially in heat. Bring it to us immediately: dangerous-goods disposal handled directly by Reparo, replacement for EUR 89. Until then, don't keep charging the device or leave it in the sun.
Is the screen damaged during the Xiaomi 12S Ultra battery replacement?
No, not with us. We open the Xiaomi 12S Ultra from the back, the screen stays untouched. With the aluminium build we monitor the heat management especially carefully so the aluminium frame doesn't warp.
Can I just drop my Xiaomi 12S Ultra off at Reparo?
Reparo has no walk-in counter. You book an appointment online – our courier comes to your address across all 23 Vienna districts. From the rest of Austria, insured shipping with return postage included in the price.
How does the pickup service in Vienna work for the Xiaomi 12S Ultra battery replacement?
Book online, pick a time slot between 9am and 6pm, the courier drives to your Vienna address (1st district to 23rd, Liesing). Battery replacement takes 60-90 minutes in the studio, return often the same day. Courier included in the EUR 89 fixed price.
Is shipping from the rest of Austria safe for a Xiaomi 12S Ultra battery?
Yes. Battery shipping falls under dangerous-goods class 9 – we send a UN-approved shipping box. The Xiaomi 12S Ultra arrives insured in Vienna and goes back the same way after the replacement. We regularly handle customers from Graz, Linz, St. Pölten, Klagenfurt, Innsbruck and Bregenz.
Is any data lost during the Xiaomi 12S Ultra battery replacement?
No. The flash storage, Mi account and SIM card are not disconnected during the battery replacement. Photos, WhatsApp chats, apps and settings all stay fully intact. A Mi Cloud backup is still recommended before any repair.
How long is the warranty on the new Xiaomi 12S Ultra battery?
Six months on the battery cell and the fitting. If the cell loses more than 10% capacity in that time: a free re-replacement. Not covered is deep discharge from leaving it unused for months, or external force.
Do I lose the Xiaomi warranty through the Xiaomi 12S Ultra battery replacement?
The Xiaomi original warranty (1 year) on the Xiaomi 12S Ultra expired 3 years ago. While a manufacturer warranty is still running, it ends with repairs outside authorised workshops. Reparo warranty: 6 months from fitting on the cell and the labour.
Is the Xiaomi 12S Ultra battery replacement still worth it in 2026?
Yes. A battery replacement at EUR 89 vs. a used device with a fresh battery from around EUR 449 – plus moving your data, setting up a new Mi account and lost app data. The Xiaomi 12S Ultra still receives MIUI/HyperOS updates from Xiaomi, and the repair extends its life by 2-3 years.
Replace your Xiaomi 12S Ultra battery in Vienna – book an appointment
Fixed price EUR 89, 60–90 minutes, 4860 mAh Li-polymer, MIUI/HyperOS calibration, 6-month warranty.