MarTech · Kennesaw, GA
Battery Replacement in Kennesaw, GA
Fast, same-day battery replacement for iPhone, Samsung Galaxy & MacBook. Quality parts, tested after every install, and backed by a warranty on parts and labor.
Most repairs done in under an hour · Walk-ins welcome · Call (770) 226-4310
A dying battery is one of the most frustrating things that can happen to a phone or laptop — especially when the device itself is otherwise perfectly fine. At MarTech in Kennesaw, we offer professional battery replacement for iPhones, Samsung Galaxy phones, and MacBooks. We use quality replacement batteries and test every device thoroughly after installation so you leave with a device that holds a full charge again.
Devices We Service
From the newest flagships to older favorites, we replace batteries across all three platforms.
iPhone Battery Replacement
If your iPhone shuts down unexpectedly, drains within a few hours, runs hot, or Battery Health drops below 80%, it’s time for a replacement. Most are done in under an hour, and we test charging and battery health after every swap.
Models we service
- iPhone 17, iPhone Air, 17 Pro, 17 Pro Max
- iPhone 16, 15, 14, 13, 12 (all variants)
- iPhone 11, XS, XS Max, XR, X
- iPhone SE (all generations)
- iPhone 8, 8 Plus, 7, 7 Plus, 6s, 6
Samsung Battery Replacement
When your Galaxy loses charge rapidly, takes forever to charge, runs warm, or the battery looks swollen, replacement is the right move. We work across the Galaxy S, A, Note, and Z lineups and verify proper charging before returning your device.
Models we service
- Galaxy S — S25, S24, S23, S22, S21, S20, S10, S9 & earlier
- Galaxy A — A55, A54, A53, A35, A34, A14 & more
- Galaxy Note — Note 20, 10, 9, 8
- Galaxy Z — Z Fold & Z Flip models
MacBook Battery Replacement
If your MacBook dies in a few hours, only works when plugged in, or macOS warns that the battery needs service, we can help. We replace MacBook batteries and check cycle count and performance after every install.
Models we service
- MacBook Air — M1–M5 & Intel (2015–present)
- MacBook Pro 13″ — M1, M2 & Intel (2015–present)
- MacBook Pro 14″ & 16″ — M1–M4 Pro/Max
- MacBook 12″ — 2015–2019 models
Signs Your Battery Needs Replacing
Not sure if the battery is the problem? These are the most common warning signs across any device:
- Device dies significantly faster than it used to
- Unexpected shutdowns even at 20–30% remaining
- Device only works when plugged in
- Battery percentage jumps or drops erratically
- Device runs unusually hot during normal use
- Battery appears swollen or is lifting the screen
- Low Battery Health (iPhone) or “Service Recommended” (MacBook)
Why Choose MarTech in Kennesaw
Same-Day Service
Most battery replacements are finished the same day — often within an hour.
Quality Parts & Warranty
We use quality replacement batteries and back every install with a warranty on parts and labor.
Tested Every Time
Every device is tested for charging performance and battery health before you leave.
Battery Replacement FAQs
How long does a battery replacement take?
Most iPhone, Samsung, and MacBook battery replacements at MarTech are completed the same day — often in under an hour. Walk-ins are welcome at our Kennesaw shop.
When should I replace my phone or laptop battery?
Consider a replacement when your device drains quickly, shuts down unexpectedly above 20% charge, runs hot, only works while plugged in, or shows a low Battery Health or “Service Recommended” warning. A swollen battery should be replaced right away.
Is replacing the battery worth it, or should I buy a new device?
If the rest of your device works well, a battery replacement is one of the most cost-effective repairs you can make. It restores full runtime and extends the life of your iPhone, Samsung, or MacBook for a fraction of the cost of a new device.
Where is MarTech located and what are your hours?
We’re at 4221 Bells Ferry Rd, Kennesaw, GA 30144. We’re open Monday–Friday 11am–6pm and Saturday 12pm–5pm. Walk-ins are welcome, or call (770) 226-4310 for a quick quote.
Ready to Bring Your Battery Back to Life?
Get a fast, no-obligation quote for your iPhone, Samsung, or MacBook battery replacement in Kennesaw.