The iPhone 11 is one of the most popular models still used by millions of people around the world. However, after several years of intensive use, the battery on this device starts showing signs of degradation. If you notice that your iPhone 11 is draining faster, charging more slowly, or shutting down unexpectedly, it's time for a battery replacement.At Viper Mobile, located at Bulevar Arsenija Čarnojevića 91/3 in New Belgrade, we've been specializing in professional iPhone battery replacements since 2004. Our years of experience ensure that your iPhone 11 will work like new again. The lithium-ion batteries used in the iPhone 11 have a limited number of charge cycles. After 500–800 cycles, battery capacity begins to drop significantly. This manifests as shorter battery life, more frequent charging, and decreased system performance. iOS automatically throttles the processor when it detects an aging battery, resulting in slower app performance.We exclusively use premium replacement batteries from verified suppliers, with capacity equal to or greater than the original Apple battery. After the replacement, your iPhone 11 will show a Battery Health of 100%, meaning full restoration of its original performance.The price for a premium battery replacement for the iPhone 11 is 5500 RSD, which is an exceptionally affordable investment in extending the life of your device. With every replacement, we provide a 90-day warranty on the work performed. The entire procedure takes approximately one hour. Our certified technicians use professional tools and procedures that guarantee the safety of your device. Before starting, we test the current battery condition and explain all the necessary steps to you. After installing the new battery, we perform thorough testing of all device functions to make sure everything works flawlessly. Your iPhone 11 will once again have a full day of use on a single charge, faster app launches, and a stable connection. Call us at 065/362-61-31 or visit our shop directly. We work professionally, quickly, and with full understanding of our customers' needs.
Battery Replacement iPhone 11
Price List
A quality aftermarket battery at full capacity. On iPhone 12 and newer, Battery Health works normally and the phone reads it as “Used” in Parts & Service History — a pre-owned original, which it is not. No pop-up warnings. 90-day warranty.
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 iPhone battery?
Check Battery Health in Settings → Battery → Battery Health. If it's below 80%, replacement is recommended. Other signs include: phone shutting down at 20-30%, rapid draining, and slow charging.
How long does iPhone battery replacement take?
iPhone battery replacement takes 1 to 3 hours depending on the model.
Will I lose my data during iPhone battery replacement?
No. Battery replacement does not affect your data, photos, apps, or settings on your iPhone. We never erase anything and never ask for your unlock code.
Is the iPhone battery original?
Yes. For iPhone 12 and newer, we use original batteries from the authorized Apple distributor that display 'Genuine Apple' status and Battery Health percentage in settings. For older models, we offer premium high-capacity batteries.
How long does a new iPhone battery last?
An original Apple battery typically retains over 80% capacity during the first 2 years of normal use (approximately 500 charge cycles). Exact lifespan depends on usage patterns.
What is the warranty on an iPhone battery replacement?
Genuine Apple (original) batteries: 6-month warranty. Premium replacement and JCID Enhanced batteries: 90 days (3 months). One exception: if the phone's back cover is cracked at the time of installation, the battery warranty does not apply — a shard of glass can fall inside and puncture the new battery. That is why we suggest replacing the cover during the same visit; the battery then keeps its full warranty. The exception applies to the battery only — all other installed parts keep their regular warranty periods.
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
Related Services
Our repair shop is located in New Belgrade — phone repair New Belgrade