Gwangju iPhone battery replacement you can watch: SANFIX in Sangmu

In short

SANFIX is an iPhone, iPad and Apple Watch repair shop on the 7th floor of the BYC Building in the Sangmu District of Seo-gu, Gwangju. After more than 3 years of use, an iPhone 15 Pro's battery health had fallen to 77%, so SANFIX fitted a KC-certified high-capacity battery in an open work area where the customer watches the whole process. The swap required no data reset or backup, and the battery carries a 180-day warranty.

Main image for the iPhone 15 Pro battery replacement review

Good to know

Location
Unit 704-2, 7F, BYC Building, 43 Sangmujungang-ro, Seo-gu, Gwangju
Getting there
7-minute walk from Sangmu Station Exit 4
Parking
Above-ground and underground parking in the building, fees covered for up to 1 hour 30 minutes
Repairs handled
iPhone, iPad, Apple Watch
Battery options
KC-certified high-capacity battery or genuine certified battery
After-service
180-day battery warranty
Booking
Naver Reservation available
Years in business
11th year in Sangmu District, since 2015

as written by the visitor on Sep 26, 2026

Today's post is about my iPhone 15 Pro battery replacement!

Main image for the iPhone 15 Pro battery replacement review

Why I chose SANFIX for an iPhone battery replacement in Gwangju

My battery has been draining so fast lately. By the afternoon I was scrambling to find a charger 🔋 So I went to SANFIX, known for iPhone battery replacement in Gwangju!

SANFIX location and parking: 7 minutes from Sangmu Station Exit 4

It's located on the 7th floor of the BYC Building in Sangmu District.

Exterior of the BYC Building in Sangmu District
Entrance of the BYC Building where SANFIX is located

It's about a 7-minute walk from Sangmu Station Exit 4!

Route from Sangmu Station Exit 4 to SANFIX

Driving is fine too. You can use the building's above-ground and underground parking, and they cover parking fees for up to 1.5 hours 🚗

Parking guide sign for the BYC Building
Path inside the building leading up to the 7th floor

The store has a clean, quiet atmosphere.

Clean and quiet atmosphere inside SANFIX

Let's peek into the office.

Entrance to the SANFIX office

They said they've been in Sangmu District for 11 years now, since 2015. Being an established place, it felt trustworthy.

Interior of SANFIX, operating for 11 years

An open work area where you watch the repair happen

What I liked about SANFIX was that you can actually watch the repair happen! They work in a space visible to customers.

Repair work area visible to customers
View of the SANFIX repair workbench

It's reassuring to see exactly what's happening to my phone 👀

Consultation area where you can watch the repair process

Consultation and diagnostics: battery health, charging response, power status

The consultation was thorough from the start. They checked battery performance, charging response, and power status first.

Consultation checking battery performance and power status

Fitting the high-capacity battery in the iPhone 15 Pro

They explained the battery options too. Since I plan to use this phone for a long time, I went with the high-capacity option — a KC-certified high-capacity battery. There's also a genuine certified battery option if you'd rather go that route.

iPhone 15 Pro battery health showing 77 percent

My original battery health was at 77% ㅜㅠ After more than 3 years of use, I couldn't leave the house without a portable charger ㅜㅜ

The work took less time than I expected. It was replaced without any data reset, so all my photos and contacts stayed exactly as they were 📱

iPhone screen after replacement with no data reset needed

After finishing, they checked the charging and power status before handing it back. No backup process needed at all — super fast.

Information on the replaced high-capacity battery

What the 180-day battery warranty covers

Details about the battery I had replaced are written here too. And what I liked most was the warranty period! The battery comes with a 180-day warranty. I've heard some places won't help if something goes wrong after replacement, but here they clearly stand behind their work, which I appreciated 👍

Notice of the 180-day battery warranty
iPhone 15 Pro being checked after completed replacement

How the iPhone 15 Pro feels after the new battery

Using it now, it definitely lasts longer. I worry less about charging even after using it all day. It feels less warm than before, too.

My rating for SANFIX

  • Friendliness ⭐⭐⭐⭐⭐
  • Explanation ⭐⭐⭐⭐⭐
  • Work speed ⭐⭐⭐⭐⭐
  • After-service ⭐⭐⭐⭐⭐
  • Accessibility ⭐⭐⭐⭐

SANFIX at a glance: address, hours and booking

  • 📍 SANFIX · 7F, Unit 704-2, BYC Building, 43 Sangmujungang-ro, Seo-gu, Gwangju
  • 🚇 7-minute walk from Sangmu Station Exit 4
  • 🚗 Building parking available (up to 1.5 hours supported)
  • 🔧 iPhone, iPad, Apple Watch repair
  • 🔋 180-day battery warranty
  • 📅 Naver Reservation available

A Gwangju iPhone repair shop with friendly explanations and solid after-service!

Summary image of SANFIX store information

By the way, since you can book through Naver Reservation, you can get straight to your consultation without waiting.

Screen showing SANFIX's Naver Reservation availability
Channel screen showing SANFIX repair cases

They're also active on Instagram and their blog. Lots of repair cases are posted there, so it's worth checking before you visit 😊

Be sure to check their review event too

Notice about SANFIX's review event

Where it is

SANFIX샌픽스

7F, Unit 704-2, BYC Building, 43 Sangmujungang-ro, Seo-gu, Gwangju, South Korea전남광주통합특별시 서구 상무중앙로 43 BYC빌딩 7층 704-2호 샌픽스

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