Mi 8 Battery Replacement Vienna
Is your Mi 8 giving up by the evening and shutting off at 20%? After 1000+ cycles and several years of daily use, the battery cell (3400 mAh) is simply worn out. Reparo swaps it in Vienna for a fixed EUR 55 — 18W fast charging keeps working, with a 6-month warranty. Usually 60–90 minutes, with the Vienna pickup service or send-in from anywhere in Austria.
Mi 8 battery prices at a glance
Battery replacement
Complete fixed price incl. fitting
- 3400 mAh rated capacity as from the factory
- Battery-health calibration via MIUI
- 18W standard charging retained
- Certified lithium-polymer battery cell
- 6-month warranty on the cell and fitting
Diagnostic check 25 EUR, waived on repair. Vienna pickup service included.
Typical battery problems with the Mi 8
- Your Mi 8 no longer lasts a working day – it used to easily reach 6-8 hours of screen-on time
- The phone suddenly shuts off at 25-35% remaining charge and only comes back once plugged in
- The Mi 8 gets warmer than before while charging – a sign of increased internal resistance in the old cell
- The battery shows 40% and two minutes later the reading jumps to 18% — the battery gauge is miscalibrated
- The Mi 8 no longer sits flat on the table — the back is bulging slightly in the middle
- The Mi 8 won't start after a full discharge, even after charging for a while
- MIUI shows a clearly reduced maximum capacity in the battery settings
How does the Mi 8 battery replacement work?
- Battery diagnosis via MIUI + meter
MIUI settings → Battery → Health shows the capacity. Our voltage/impedance measurement on the battery module confirms the finding. At < 80 % capacity or a cycle count > 500 we recommend a replacement.
- Gently opening the back
The Mi 8 is opened with a special suction cup and a warmed adhesive edge. The back is carefully lifted off without warping the aluminium frame.
- Releasing 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.
- Fitting a certified 3400 mAh cell
A new lithium-polymer cell with identical capacity, 3.87 V nominal voltage and a precise form factor. The connector on the mainboard, adhesive on the frame, contact pressure controlled.
- Re-sealing + gasket
Old adhesive film removed, fresh Xiaomi adhesive applied, the back re-bonded under pressure. 30 minutes of curing time.
- Full charge + calibration
First charge to 100 % at 25 °C – MIUI re-calibrates the battery gauge to the new cell. We check battery health and 18W charging.
Replacing the Mi 8 battery – price, process and charging technology in Vienna
The lithium-polymer battery in the Mi 8 has a 3400 mAh capacity. After 500 to 700 full cycles the maximum capacity drops to 80 % – reached after 2-3 years with daily use. MIUI shows you exactly where you stand under Settings → Battery → Battery health.
Reparo replaces the Mi 8 battery in Vienna for a fixed EUR 55. That is about 11 % of the original launch price (EUR 499). Included: a certified 3400 mAh lithium-polymer cell, fitting, MIUI calibration and a 6-month warranty. If you also have screen damage: Mi 8 screen replacement.
Xiaomi service vs. Reparo – what makes the difference?
Authorised Xiaomi service centres in Austria charge EUR 60-90 for the battery replacement depending on the model – and only at certified partners specialised in Mi 8 service. Reparo charges EUR 55 – we use Xiaomi-compatible lithium-polymer cells with the same cell chemistry and charging curve. All options for your device: Mi 8 repair overview.
Frequently asked questions about the Mi 8 battery replacement
Xiaomi battery replacement – what does it cost for the Mi 8 in Vienna?
A Mi 8 battery replacement at Reparo in Vienna costs a fixed EUR 55. Included: a certified lithium-polymer cell with 3400 mAh, MIUI calibration and a 6-month warranty. Diagnostic check 25 EUR, waived on repair. Pickup service in Vienna or send-in from anywhere in Austria.
What does the Mi 8 battery replacement cost?
The Mi 8 battery replacement at Reparo in Vienna costs a fixed EUR 55. Included: a certified 3400 mAh lithium-polymer cell, fitting, MIUI calibration, an 18W charging test and a 6-month warranty. The 25 EUR diagnostic check is waived once you go ahead.
How long does the new Mi 8 battery last?
With normal use the replacement battery lasts 500-700 full cycles at a minimum of 80 % capacity – roughly 2.5 to 3.5 years of daily life. One full cycle equals a complete discharge from 100 % to 0 %. The warranty runs for 6 months on the cell and fitting.
Is the 3400 mAh Mi 8 battery a standard replacement or original?
We fit certified 3400 mAh battery cells to the original Xiaomi specification: 3.87 V nominal voltage, identical capacity, the same charging curve. Original Xiaomi service packs are only available through authorised Xiaomi service centres. Our cells last measurably just as long.
Does 18W fast charging work on the Mi 8 after the replacement?
Yes. The 18W fast-charging electronics sit on the Mi 8 mainboard, not in the battery. Our replacement cell supports the full charging protocol and charges with original Xiaomi power adapters in the same time as before. The cell chemistry is designed for high-current charging.
Does the Mi 8 have wireless charging?
No. By design the Mi 8 has no wireless charging – in this class Xiaomi leaves out the Qi coil to optimise price and weight. Charging works exclusively via USB-C at up to 18W.
My Mi 8 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 and explosion risk, especially in heat. Come to us right away: hazardous-waste disposal handled directly by Reparo, replacement for EUR 55. Until then, don't keep charging the device or leave it in the sun.
Will the screen be damaged during the Mi 8 battery replacement?
No, not with us. We open the Mi 8 from the back, leaving the screen untouched. With the aluminium construction we monitor the temperature control especially carefully so the aluminium frame doesn't warp.
Can I just drop my Mi 8 off at Reparo?
Reparo has no customer access on site. You book an appointment online – our courier comes to your address across all 23 Vienna districts. From the provinces, insured shipping with the return included in the price.
How does the Vienna pickup service for the Mi 8 battery replacement work?
Book online, choose a slot between 9 am and 6 pm, the courier drives to your Vienna address (1st district to the 23rd, Liesing). The battery replacement takes 60-90 minutes in the studio, with the return often the same day. Courier included in the fixed EUR 55. Pickup service in Vienna starts at EUR 7.90.
Is shipping from the provinces safe for a Mi 8 battery?
Yes. Battery shipping falls under hazard class 9 – we send a UN-approved shipping box. The Mi 8 arrives in Vienna insured and goes back the same way after the swap. We regularly have customers from Graz, Linz, St. Pölten, Klagenfurt, Innsbruck and Bregenz. Return shipping is free across Austria.
Is any data lost during the Mi 8 battery replacement?
No. The flash storage, Mi account and SIM card are not disconnected during a battery swap. Photos, WhatsApp chats, apps and settings all remain fully intact. A Mi Cloud backup is still recommended before any repair.
How long is the warranty on the new Mi 8 battery?
Six months on the battery cell and fitting. If the cell loses more than 10 % capacity in that time: a free re-swap. Not covered are deep discharge from leaving it idle for months or external force.
Do I lose the Xiaomi warranty through the Mi 8 battery replacement?
The original Xiaomi warranty (1 year) on the Mi 8 expired 7 years ago. If a manufacturer warranty is still running, it lapses through repairs outside authorised workshops. Reparo warranty: 6 months from fitting on the cell and labour.
Is the Mi 8 battery replacement still worth it in 2026?
Yes. Battery replacement at EUR 55 vs. a used device with a fresh battery from around EUR 99 – plus moving your data, setting up a new Mi account and losing app data. The Mi 8 still receives MIUI updates from Xiaomi, and the repair extends its life by 2-3 years.
Replace your Mi 8 battery in Vienna – book an appointment
Fixed price EUR 55, 60–90 minutes, 3400 mAh lithium-polymer, MIUI calibration, 6-month warranty.