If your Lenovo ThinkPad T480 battery drains quickly, won’t charge, or dies suddenly, replacing it is one of the easiest and most cost-effective repairs you can do—even if you’ve never opened a laptop before.

The T480 is unique because it has:

• 🔋 External removable battery
• 🔋 Internal battery

This guide walks you through replacing BOTH safely, step-by-step.

🔍 Signs You Need a New Battery

You likely need a replacement if:

• Battery lasts less than 1–2 hours
• Laptop shuts off at random percentages
• Battery stuck at 0% or 100%
• “Plugged in, not charging” message

🛠️ Tools You’ll Need

• Small Phillips screwdriver (#0 or #00)
• Plastic pry tool (or guitar pick)
• Clean, flat workspace

👉 Optional (recommended):

• Anti-static wrist strap
• Magnetic tray for screws

⚠️ Before You Start (Important for Beginners)

1. Shut down your laptop completely
2. Unplug charger
3. Hold power button for 10 seconds (discharges leftover power)
4. Work on a table (not carpet)

🔧 Step-by-Step Instructions

🔹 Step 1: Remove External Battery (Easiest Part)

• Flip laptop upside down
• Locate two sliding locks
• Slide them outward
• Pull battery out

👉 If it doesn’t come out easily, don’t force it—check locks again.

🔹 Step 2: Remove Bottom Cover

• Unscrew all visible screws on the back panel
• Screws may stay attached (this is normal)
• Use a plastic tool to gently pry around edges

👉 Start at a corner and work slowly around

🔹 Step 3: Locate Internal Battery

You’ll see:

• A large black rectangular battery
• Connected to motherboard via cable

🔹 Step 4: Disconnect Battery Cable

• Find the connector (small plug with wires)
• Gently wiggle it out horizontally

❗ Do NOT:

• Pull on wires
• Use force

🔹 Step 5: Remove Internal Battery

• Unscrew 3–5 screws holding battery
• Lift battery out slowly

🔹 Step 6: Install New Battery

• Place new battery in same position
• Screw it in
• Reconnect cable firmly

👉 You should feel a slight “click” when fully connected

🔹 Step 7: Reassemble Laptop

• Snap bottom cover back on
• Tighten screws
• Reinsert external battery

🔄 After Installation (Don’t Skip This)

1. Plug in charger
2. Charge to 100%
3. Use laptop until ~15%
4. Recharge again

👉 This helps battery calibration

💡 Beginner Tips

• Take pictures before removing anything
• Keep screws organized
• Don’t rush—this should take 20–30 minutes

❓ FAQ

How much does a replacement battery cost?
$30–$80 depending on quality.

Is this safe for beginners?
Yes—T480 is one of the easiest laptops to work on.