The Samsung Galaxy A31 is a model that won users over with its combination of performance and affordability, but like any electronic device, its battery loses capacity over time. When you notice that your A31 is starting to drain faster or shutting down unexpectedly, it's time for a professional battery replacement. At Viper Mobile, with two decades of experience repairing Samsung devices, we can restore your phone's original endurance. The Galaxy A31 comes with a 5000mAh battery designed to support all the features of this versatile phone. This model uses the Helio P65 processor which, although efficient, combined with the 6.4-inch Super AMOLED display requires a stable power supply. When the battery starts to age, users most often notice a drop in performance precisely with the most demanding applications — the camera, video calls or gaming apps become unreliable because of unstable power delivery. Typical signs of an aged battery on the A31 include sudden drops from 40-50% straight to zero, slower charging, overheating during use, or even an increase in the phone's thickness due to battery swelling. These symptoms should not be ignored, as they can lead to damage to other components. Our price for replacing the battery with a genuine Samsung Service Pack battery is 7.000 dinars. These batteries go through the same quality controls as the ones installed during phone manufacturing and are guaranteed to restore your Galaxy A31 to its original functionality. The difference between a genuine Service Pack battery and cheaper replacements is enormous. A genuine battery will not only hold a charge longer, it will also allow all of the phone's functions to work reliably. Your A31 will once again be able to record 4K video without interruption, run multiple apps at the same time, and use GPS navigation for hours without any fear of an unexpected shutdown. The battery replacement procedure on the Samsung Galaxy A31 requires precision because of the specific construction of the housing. Our certified technicians use original Samsung disassembly tools, which guarantees there will be no damage to the display, cameras or other sensitive components. The entire procedure takes 2 to 3 hours. During the service, in addition to replacing the battery, we also perform a basic diagnostic check of the phone to make sure all systems are working correctly. We pay particular attention to cleaning the contacts and checking the integrity of the flex cables that connect the battery to the rest of the device. Since 2004 we have been working at Bulevar Arsenija Čarnojevića 91/3 in New Belgrade, providing quality Samsung repair services. Battery replacement comes with a 90-day warranty. Our contact phone number is 065/362-61-31.
Price List
Note: if the back cover is cracked, the battery warranty does not apply — a shard of glass can fall inside and puncture the new battery. If we replace the cover during the same visit, the battery keeps its full warranty.
Frequently Asked Questions About Battery Replacement
How do I know if I need a new Samsung battery?
Open Samsung Members → Support → Phone diagnostics → Battery status. Samsung does not show a capacity percentage the way iPhone does — it gives a rating: Normal, Weak or Bad. On newer models (S23 and up) the exact percentage and charge cycle count also appear under Settings → Battery and device care → Battery. Practical signs it is time for a replacement: the phone shuts down at 20-30%, the battery drains faster than before, charging takes longer than usual, or the battery is physically swollen.
How long does Samsung battery replacement take?
From 2 to 3 hours. The battery swap itself is the shorter part of the job — most of that time goes to curing the adhesive that holds the back cover in place. That step cannot be rushed: if the phone is collected before the adhesive sets, the cover will not seat properly. That is why the device stays with us for the full period.
Will I lose my data during Samsung battery replacement?
No. Battery replacement does not affect your data, photos, apps, or settings on your Samsung phone. We never erase anything and never ask for your unlock code. One thing to know before the repair: after a battery replacement the phone is no longer water resistant, because the factory seal is opened once and cannot be restored to factory condition.
Is the Samsung battery original?
Yes. We use exclusively original Samsung batteries from the authorized distributor with full factory capacity. No copies or generic replacements — only originals compatible with Samsung fast charging technology.
Will the phone perform like new after a battery replacement?
The battery will be new — but the phone will not behave like it did on day one, and that is not down to the battery. Apps have grown several times over: what used to take 30 MB now takes 150 MB and draws far more power. So a new original battery in a Galaxy S21 after five years of use will not last as long as the factory one did — the same capacity now powers a much heavier load. A battery replacement fixes sudden drain, shutdowns at 20-30% and charging several times a day; it does not turn the phone back into the year it was bought. An original Samsung battery typically retains over 80% capacity through the first 2 years of normal use (about 500 charge cycles).
How much does a Samsung battery replacement cost?
The price depends on the model — exact prices for every Galaxy model are listed in the price table on this page. The price is fixed per model and includes an original Service Pack battery, professional installation and VAT, with no hidden costs. If your model is not in the table, call us for an exact price.
What warranty do I get on a Samsung battery replacement?
The warranty is 3 months (90 days) on the installed battery and labor. The exception are Galaxy Z Flip and Z Fold models — repairs on foldable devices are performed only with the customer’s consent and without warranty, because authorized suppliers do not provide a warranty on parts for those models. The battery warranty also does not apply if the back cover is cracked — a shard of glass can fall inside and puncture the new battery. If we replace the back cover during the same visit, the battery keeps its full warranty.
We send a courier to pick up your phone and return it repaired. Available across Belgrade.
1,500 RSD
Hydrogel Screen Protection
With every repair — hydrogel film at a special price of 2,000 RSD. Protects against scratches and minor impacts.
2,000 RSD
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Our repair shop is located in New Belgrade — phone repair New Belgrade