Samsung Galaxy A21s Battery Replacement Vienna
Does your Galaxy A21s no longer last a full workday, shut down unexpectedly at 30 % or get hot while charging? Reparo replaces the 5000-mAh battery in Vienna – €55 fixed price with a certified battery cell, 6 months warranty. 15W fast charging stays intact. Usually done in 60–90 minutes, pickup service in Vienna or send-in from anywhere in Austria.
Galaxy A21s battery prices at a glance
Battery replacement
Complete fixed price incl. installation
- Certified Li-polymer battery cell
- Nominal voltage 3.85 V, original capacity
- Battery health calibration after installation
- Fast-charge compatibility fully retained
- 6 months warranty on cell and installation
Diagnostic check without repair 25 EUR (waived on repair order). Pickup service in Vienna included.
Typical battery problems on the Galaxy A21s
- The Galaxy A21s no longer lasts a full workday – you used to easily get 5–7 hours of screen time
- The device suddenly shuts down at 20–30 % remaining charge and only turns on again once plugged in
- The 5000-mAh battery gets noticeably hot while charging or during 15W fast charging
- The battery percentage jumps in large steps (60 % → 20 %) – the calibration is lost
- The back panel bulges at the battery area – visible swelling (a result of deep discharge)
- The device no longer starts after fully discharging – the battery is deeply discharged
The Galaxy A21s launched in 2020 with a 5000 mAh LCD (the first 5000-mAh A model). An ignored issue quickly leads to follow-up damage – see the Galaxy A21s repair overview for all options.
How does the Galaxy A21s battery replacement work?
- Battery diagnosis
The Samsung service code *#0228# shows voltage, temperature and cycle count. Capacity below 80 % or more than 500 cycles justifies the replacement.
- Open the back cover or display
On the Galaxy A21s the battery sits behind the back cover on models from 2021 onward. We heat the adhesive layer to 70 °C and release it carefully.
- Remove the old battery
The 5000-mAh cell is fixed to the plastic frame with pull tabs. We dissolve the adhesive with isopropanol-99, never with a screwdriver as a lever.
- Install a certified 5000-mAh cell
Same nominal voltage (3.85 V), same capacity, same form factor. Connector to mainboard, adhesive to frame, contact pressure controlled.
- Re-sealing
The frame is closed with fresh adhesive. The Galaxy A21s has no factory IP protection – but dust and splash protection is restored.
- Full charge + calibration
First charge at 25 °C to 100 %, then a full discharge and recharge. The battery gauge is calibrated to the new cell.
Reparo works without customer access – your Galaxy A21s is collected by courier in Vienna or sent in insured (in a hazardous-goods compliant shipping box).
Replacing the Galaxy A21s battery – price, process and battery life in Vienna
The 5000-mAh battery in the Galaxy A21s lasts 500 to 700 full cycles under normal use – that usually equals 2 to 3 years of everyday use. After that the usable capacity drops below 80 %, and you notice it through battery shutdowns at 20–30 %, a hot case while charging or a bulging part of the housing. Our Galaxy A52 shows similar ageing patterns, but the battery cells and prices differ.
Reparo replaces the Galaxy A21s battery in Vienna for a €55 fixed price – that is about 18 % of the original launch price (€300). Included are certified 5000-mAh cells, calibration and 6 months warranty. If you also have display problems: see the A21s screen replacement.
Certified cell vs. Samsung original – what goes into the Galaxy A21s?
For the Galaxy A21s we install certified 5000-mAh battery cells that match the original Samsung specifications: 3.85 V, the same charge curve. Original Samsung service packs are only available through Samsung service centres – our replacement cells measurably last just as long. Price comparison of all battery repairs: Samsung overview.
Frequently asked questions about the Galaxy A21s battery replacement
What does the battery replacement cost on the Galaxy A21s?
The Galaxy A21s battery replacement costs €55 fixed price at Reparo in Vienna. Included: certified 5000-mAh battery cell, calibration, 6 months warranty. The 25 EUR diagnostic check is waived on a repair order.
How long does the new Galaxy A21s battery last?
The replacement battery lasts 500 full cycles with at least 80 % capacity – about 2.5 to 3.5 years of everyday use. One full cycle = a complete discharge from 100 % to 0 %.
Is the 5000-mAh battery on the Galaxy A21s a standard replacement or an original?
We install certified 5000-mAh battery cells with original Samsung specifications: the same 3.85 V, the same capacity, the same charge curve. Original Samsung service packs are only available through Samsung service centres and are not obtainable for independent workshops.
Does the Galaxy A21s charge just as fast at 15W after the battery replacement?
Yes. The Galaxy A21s supports 15W charging via USB-PD – the logic sits on the mainboard and is not touched. The same charge times as from the factory.
Does the Galaxy A21s have wireless charging?
No, the Galaxy A21s has no wireless charging by design – Samsung leaves out the Qi coil on the A-series to optimise price and weight. It charges exclusively via USB-C with up to 15W.
Does the Galaxy A21s have water protection?
No, the Galaxy A21s has no factory IP rating. During the battery replacement we seal the housing with fresh adhesive against dust and splash water – avoid active submersion.
Is the display damaged during the Galaxy A21s battery replacement?
No, not with us. On Galaxy A21s models with the battery under the display we heat the adhesive layer in a temperature-controlled way and release it without bending or pressure. If the adhesive strip tears, we renew it at no cost.
Can I drop off my Galaxy A21s directly at Reparo?
Reparo has no on-site customer access. You book online and our courier comes to all 23 districts of Vienna. From the federal provinces, send it in insured.
How does the pickup service in Vienna work for the Galaxy A21s battery replacement?
Book online, choose a time slot (9am–6pm), the courier drives to your Vienna address. The battery replacement takes 60–90 min in the studio, with return often the same day. The courier is included in the €55 fixed price.
Is the shipment from the provinces safe for a Galaxy A21s battery?
Yes. Battery shipping falls under hazardous-goods class 9 – we send a special UN-approved shipping box. The Galaxy A21s arrives in Vienna insured and goes back the same way.
Is data lost during the Galaxy A21s battery replacement?
No. The flash storage, Samsung account and SIM stay untouched. Photos, WhatsApp chats, apps – everything stays. A Samsung cloud backup is still recommended (5 min, included).
How long is the warranty on the new Galaxy A21s battery?
Six months on cell and installation. If the cell loses more than 10 % capacity in that time: a free re-replacement. Not covered: deep discharge from leaving the device idle for months.
Do I lose the Samsung warranty through the Galaxy A21s battery replacement?
The original Samsung warranty has expired on most Galaxy A21s devices for 2+ years. Reparo warranty is 6 months on cell and labour.
Is the Galaxy A21s battery replacement still worth it in 2026?
Yes. Battery replacement €55 vs. a used device from about €120 – plus moving data and setting up 2FA again cost time. The Galaxy A21s still receives some security updates from Samsung.
My Galaxy A21s was empty for months – can the battery still be replaced?
Yes, but a diagnosis is mandatory. With a deep discharge of more than 3 months the cell can be irreversibly damaged. We check the voltage during the diagnosis (25 EUR, waived on repair).
Replace the Galaxy A21s battery in Vienna – book an appointment
Fixed price from €55, 60–90 minutes of work, 6 months warranty. Diagnostic 25 EUR waived on repair.