🔋 How We Replaced the Battery on an ASUS ROG Phone 7 Ultimate — And Why It's Not Your Average Phone

If you're lucky enough to own an ASUS ROG Phone 7 Ultimate, you already know it’s a powerhouse. It’s not just another Android phone — it’s a mobile gaming rig.
With its Snapdragon 8 Gen 2 processor, 165Hz AMOLED display, air triggers, and the iconic ROG Vision secondary screen, this device is designed for performance-hungry users.

But like every other smartphone, the battery is still a consumable. After around 1.5–2 years of regular use, even the best batteries start to show signs of aging — faster drain, unexpected shutdowns, or overheating. That’s exactly why we recently performed a full battery replacement on a ROG Phone 7 Ultimate.

Here’s how it went — and why this phone is one of the most challenging (and rewarding) phones to service.

🛠️ Why Battery Replacements on the ROG Phone 7 Ultimate Are So Tricky

Most smartphones are glued shut with a simple flat glass back. The ROG Phone 7 Ultimate, however, comes with a curved back panel that houses the ROG Vision display — a tiny screen that shows animations, calls, and battery status on the back of the phone.

That means extra care must be taken when heating and removing the rear cover. One slip, and you risk cracking an expensive component.

Inside, ASUS has crammed in more hardware than most flagships:

• NFC module

• Dual-board design

• Complex flex cable routing

• Heavy adhesive under the battery

All of this adds up to a phone that’s difficult to open, delicate to work on, but ultimately satisfying to restore.

🧩 Step-by-Step Breakdown of the Repair

We created a full YouTube video documenting the process, but here’s a quick overview of the main steps:

1. Power Down and Heat the Back Panel

Using a self-heating pad and alcohol, we carefully pried open the curved back without damaging the ROG Vision display.

2. Disconnect Rear Panel Components

The back includes both the NFC and flex connections to the secondary display — these must be removed delicately.

3. Battery Disconnect and Shield Removal

After unscrewing multiple shields and removing the wireless coil, we safely disconnected the battery.

4. Remove Logic Boards and Free the Battery

The daughterboard is blocked by the SIM card tray and charging port. We carefully removed both boards before applying alcohol under the battery to loosen the adhesive.

5. Install New Battery and Reassemble

With the new battery in place, we reversed the disassembly process — reinstalling cables, screws (length matters!), and finally sealing the back glass with adhesive.

💰 Battery Replacement Service 

If you’re based in Australia, we offer this battery replacement service , including genuine parts and professional installation.

📦 We accept mail-in repairs nationwide.
🔧 Turnaround time: 1–2 business days from received.
💬 Questions? Just reach out!

🎥 Watch the Full Video

We filmed the entire repair process to help fellow techs and curious ROG owners.
📺 Watch on YouTube  

Whether you're thinking about repairing your own device or just interested in the incredible internal design of ASUS phones, this teardown is worth a watch.

🧠 Why ASUS Phones Are a Breath of Fresh Air (for Repair Shops)

Unlike many other manufacturers who pump out a new phone every month, ASUS only releases a couple of phones per year.
Better yet, many of their parts are shared across models. The ROG Phone 7 and Zenfone 11 Ultra, for instance, share nearly identical internals — same screen, same board layout, same battery connector.

This consistency saves time, cost, and headaches for both users and repair technicians.

👇 Let Us Know

Do you have a ROG Phone that's overheating or draining quickly?
Comment below, email us, or DM us on YouTube — we’re always happy to help.

🛠️ Need tools or parts?

Asus Rog Phone 5 / 5s / 5 Pro / 5S Pro / 6 / 6 Pro/ 7 / 7 Pro / 7 Ultimate - OLED LCD Touch Digitizer Display Screen Assembly: https://www.polartech.com.au/products/asus-rog-phone-5-5s-5-pro-5s-pro-6-6-pro-7-7-pro-7-ultimate-oled-lcd-touch-digitizer-display-screen-assembly

[Original With Frame] Asus Rog Phone 7 Pro (AI2201_D)/7 Ultimate - Touch Digitizer AMOLED LCD Display Screen Assembly: https://www.polartech.com.au/products/original-with-frame-asus-rog-phone-7-pro-ai2201_d-7-ultimate-touch-digitizer-amoled-lcd-display-screen-assembly

Asus ROG Phone 7 Ultimate - 16GB + 512GB Unlocked Working Main Board Motherboard: https://www.polartech.com.au/products/asus-rog-phone-7-ultimate-16gb-512gb-unlocked-working-main-board-motherboard

[C21P2101] ASUS ROG Phone 7 & 7 Ultimate Replacement Battery (Twin): https://www.polartech.com.au/products/c21p2101-asus-rog-phone-7-7-ultimate-replacement-battery-twin

[With Camera Lens] Asus Rog Phone 7 Ultimate & Rog Phone 7 Pro - Back Rear Replacement Glass Panel: https://www.polartech.com.au/products/with-camera-lens-asus-rog-phone-7-ultimate-rog-phone-7-pro-back-rear-replacement-glass-panel

Asus ROG Phone 7 / 7 Ultimate - Back Rear Main Camera Module Flex: https://www.polartech.com.au/products/asus-rog-phone-7-ultimate-back-rear-main-camera-module-flex

Asus ROG Phone 7 Ultimate - Top Antenna Cover With Earpiece Speaker Module: https://www.polartech.com.au/products/asus-rog-phone-7-ultimate-top-antenna-cover-with-earpiece-speaker-module

Explore all available spare parts for the Asus ROG Phone 7 Ultimate: https://www.polartech.com.au/collections/asus-phone-parts/rog-phone-7-ultimate