Xiaomi 12 Battery Replacement Vienna
Your Xiaomi 12 no longer lasts the day, shuts off suddenly at 20-30%, or gets hot while charging? Reparo replaces the certified battery cell (4500 mAh) in Vienna – EUR 69 fixed price, 50W wireless charging stays intact, 6-month warranty. Usually done in 60–90 minutes, with pickup service in Vienna or send-in from anywhere in Austria.
Xiaomi 12 battery prices at a glance
Battery replacement
Complete fixed price incl. fitting
- Certified li-polymer battery cell
- Original rated voltage + capacity
- Battery-health calibration
- Fast-charge compatibility fully kept
- 6-month warranty
Diagnostic check without repair EUR 25 (waived if you go ahead with the repair). Pickup service in Vienna included.
Typical battery problems on the Xiaomi 12
- Your Xiaomi 12 no longer lasts a full working day – you used to comfortably reach 6-8 hours of screen time
- The phone shuts off suddenly at 20-30% remaining charge and only comes back on once it's plugged in
- The 4500 mAh battery gets noticeably hot during 67W fast charging
- The battery percentage jumps in big steps (60% → 30% → 10%) instead of dropping steadily
- Wireless charging at 50W no longer works or charges only very slowly
- The back panel bulges around the battery area – visible battery swelling after a deep discharge
- The Xiaomi 12 won't start after a full discharge, not even after charging for a while
- HyperOS shows a clearly reduced maximum capacity in the battery settings
How does the Xiaomi 12 battery replacement work?
- Battery diagnosis via HyperOS + meter
HyperOS Settings → Battery → Health shows the capacity. Our voltage/impedance measurement on the battery module confirms the result. At under 80% capacity or more than 500 cycles, we recommend a replacement.
- Open the back panel carefully
The Xiaomi 12 is opened with a special suction cup and a warmed adhesive edge. The back panel is lifted off gently, without warping the aluminium frame.
- Release the old battery
The battery cell is fixed to the aluminium frame with pull tabs. We release the adhesive strips with isopropanol-99 – never using screwdrivers as a lever.
- Fit the certified 4500 mAh cell
A new li-polymer cell with identical capacity, 3.87 V rated voltage and an exact form factor. Connector to the mainboard, adhesive to the frame, contact pressure controlled.
- Re-sealing + gasket
Old adhesive film removed, fresh Xiaomi adhesive applied, back panel bonded under pressure. 30 minutes curing time.
- Full charge + calibration
First charge to 100% at 25 °C – HyperOS re-calibrates the battery gauge to the new cell. We check battery health, 67W fast charging and 50W wireless.
Replacing the Xiaomi 12 battery – price, process and HyperCharge in Vienna
The li-polymer battery in the Xiaomi 12 has 4500 mAh of capacity, including 50W wireless charging. After 500 to 700 full cycles the maximum capacity drops to 80% – reached after 2-3 years of daily use. Xiaomi's HyperOS shows you exactly where you stand under Settings → Battery → Battery health.
Reparo replaces the Xiaomi 12 battery in Vienna for a EUR 69 fixed price. That's roughly 8% of its original launch price (EUR 899). Included: a certified 4500 mAh li-polymer cell, fitting, HyperOS calibration and a 6-month warranty. If you also have display damage: 12 screen replacement.
Xiaomi service vs. Reparo – what's the difference?
Authorised Xiaomi service centres in Austria charge EUR 60-90 for a battery replacement depending on the model – and only at certified partners specialised in Xiaomi 12 service. Reparo: EUR 69 – we use Xiaomi-compatible li-polymer cells with the same cell chemistry and charge curve. All 12 options: Xiaomi repair overview.
Frequently asked questions about the Xiaomi 12 battery replacement
Xiaomi battery replacement – what does it cost for the Xiaomi 12 in Vienna?
A Xiaomi 12 battery replacement at Reparo in Vienna costs EUR 69 fixed price. That includes a certified li-polymer battery cell with 4500 mAh, HyperOS calibration and a 6-month warranty. The EUR 25 diagnostic check is waived if you go ahead with the repair. Pickup service in Vienna or send-in from anywhere in Austria.
What does the battery replacement cost for the Xiaomi 12?
The Xiaomi 12 battery replacement costs EUR 69 fixed price at Reparo in Vienna. Included: a certified 4500 mAh li-polymer cell, fitting, HyperOS calibration, a 67W fast-charge test and a 6-month warranty. The EUR 25 diagnostic check is waived on repair.
How long does the new Xiaomi 12 battery last?
The replacement battery lasts 500-700 full cycles with at least 80% capacity under normal use – roughly 2.5 to 3.5 years of everyday use. A full cycle = a complete discharge from 100% to 0%. The warranty covers the cell and the fitting for 6 months.
Is the 4500 mAh battery for the Xiaomi 12 a standard replacement or original?
We fit certified 4500 mAh battery cells built to Xiaomi's original specification: 3.87 V rated voltage, the same capacity, the same charge curve. Original Xiaomi service packs are only available through authorised Xiaomi service centres. Our cells last measurably just as long.
Does 67W HyperCharge work on the Xiaomi 12 after the replacement?
Yes. The 67W HyperCharge electronics sit on the Xiaomi 12's mainboard, not in the battery. Our replacement cell supports the full HyperCharge 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 intact on the Xiaomi 12 after the battery replacement?
Yes. The wireless charging coil on the Xiaomi 12 sits under the aluminium back cover on a separate assembly, not on the battery. During the replacement we open the back panel, and the Qi coil stays untouched. 50W wireless works after the replacement just as before.
My Xiaomi 12 is bulging at the back – is that dangerous?
Yes, potentially. A swollen battery has built up gas pressure (cell chemistry at its end) – a fire/explosion risk, especially in heat. Come to us straight away: hazardous-materials disposal handled directly by Reparo, replacement for EUR 69. Don't keep charging the device until then.
Does the display get damaged during the Xiaomi 12 battery replacement?
No, not with us. We open the Xiaomi 12 from the back, so the display stays untouched. On aluminium/plastic models we monitor the heat especially carefully so the aluminium frame doesn't warp.
Can I just drop my Xiaomi 12 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 federal states, insured shipping, with return included in the price.
How does the Vienna pickup service work for the Xiaomi 12 battery replacement?
Book online, pick a time slot between 9 and 18:00, the courier drives to your Vienna address (1st district to the 23rd, Liesing). Battery replacement takes 60-90 minutes in the studio, with return often the same day. The courier is included in the EUR 69 fixed price.
Is shipping from the federal states safe for a Xiaomi 12 battery?
Yes. Battery shipping falls under hazardous-goods class 9 – we send a UN-approved shipping box. The Xiaomi 12 arrives in Vienna insured and goes back the same way after the replacement. Regular customers from Graz, Linz, St. Pölten, Klagenfurt, Innsbruck and Bregenz.
Is any data lost during the Xiaomi 12 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 12 battery?
Six months on the battery cell and the fitting. If the cell loses more than 10% capacity in that time: free re-replacement. Not covered is deep discharge from leaving the phone unused for months.
Do I lose the Xiaomi warranty through the Xiaomi 12 battery replacement?
The original Xiaomi warranty (1 year) on the Xiaomi 12 has been expired for 3 years. Reparo warranty: 6 months from fitting.
Is the Xiaomi 12 battery replacement still worth it in 2026?
Yes. Battery replacement EUR 69 vs. a used device with a fresh battery from around EUR 251 – plus migrating your data, setting up a new Xiaomi account and losing apps. The Xiaomi 12 still receives HyperOS updates from Xiaomi.
Replace the Xiaomi 12 battery in Vienna – book an appointment
Fixed price EUR 69, 60–90 minutes, 4500 mAh li-polymer, HyperOS calibration, 6-month warranty.