The Lenovo ThinkPad T480 is famous for its durability and all-day battery potential. One of the reasons it’s so popular is Lenovo’s dual-battery “Power Bridge” concept: the T480 can use an internal battery plus a removable external battery, giving you flexible runtime and easy replacement options.
In this guide, we’ll walk through exactly what battery the T480 uses, how the internal and external packs work together, and which replacement options are best for you. We’ll also link directly to compatible replacement batteries so you can quickly find the right part.
1. T480 battery overview: internal + external (Power Bridge)
Most ThinkPad T480 configurations use a dual-battery design:
- One internal battery (built into the chassis)
- One removable rear battery (slides into the back of the laptop)
These two batteries work together to provide longer runtime. When you’re on the go, the system can draw from both packs. When you need to swap the external battery, the internal pack keeps the machine alive for a short time so you can change batteries without shutting down.
On a replacement level, you can think of the T480 battery system as:
- Internal battery: Always the same capacity – 24 Wh (3-cell)
- External battery: Available in 24 Wh, 48 Wh or 72 Wh options
Let’s look at each of these in more detail.
2. Internal battery for ThinkPad T480 – 24Wh Lenovo 01AV421
The internal battery of the T480 is a compact 3-cell, 24 Wh pack. It’s mounted inside the chassis and is not meant to be removed daily, but it is replaceable when it wears out.
Key facts about the internal T480 battery:
- Part number (FRU): 01AV421 (also compatible with 01AV419, 01AV420, 01AV489 in many cases)
- Capacity: 24 Wh (approx. 2095 mAh)
- Voltage: Around 11.4–11.6 V (3-cell Li-ion)
- Location: Inside the laptop, under the bottom cover
- Role: Works together with the external battery for Power Bridge, and keeps the system alive during hot-swap
If your original internal battery no longer holds a charge, you can replace it with a compatible 24 Wh pack such as this one:

Internal T480 Battery – 24Wh Lenovo 01AV421
Replacement 24 Wh internal battery compatible with Lenovo ThinkPad T480 series. Ideal when your built-in battery capacity has dropped significantly and you want to restore the original Power Bridge runtime.
3. External battery options for ThinkPad T480
The removable rear battery is where the T480 becomes truly flexible. Lenovo offers three main external options in the ThinkPad 61 family:
- 24 Wh – 3-cell (Battery 61) – Slim and light
- 48 Wh – 6-cell (Battery 61+) – Balanced size and runtime
- 72 Wh – 6-cell extended (Battery 61++) – Maximum runtime, larger “bump” on the back
All three are compatible with the T480 as long as the physical form matches and you’re using genuine or high-quality compatible replacements. Below are the most common choices and when each one makes sense.
3.1 24Wh external battery – Lenovo 01AV423 (Battery 61, 3-cell)
The 24 Wh external 3-cell battery is the slimmest option. It keeps your T480 profile close to flat and is great if you prioritize portability and low weight over all-day runtime.
Typical characteristics:
- Part number: 01AV423 (Battery 61 family)
- Capacity: 24 Wh, 3-cell
- Shape: Low-profile pack that barely extends from the back edge of the laptop
- Best for: Traveling light, frequent desk use, users who plug in often

External T480 Battery – 24Wh Lenovo 01AV423 (61)
Compact 24 Wh external battery for ThinkPad T480. Ideal if you want to keep your laptop as light and slim as possible, while still benefiting from the Power Bridge dual-battery design.
3.2 48Wh external battery – Lenovo 01AV427 (Battery 61+, 6-cell)
The 48 Wh 6-cell battery is often labelled as Battery 61+. It’s one of the best all-round options for the T480 because it balances runtime and portability.
Typical characteristics:
- Part number: 01AV427 (and related 01AV425 / 01AV426 / 01AV428 family, depending on model)
- Capacity: 48 Wh, 6-cell
- Shape: Slightly thicker than the 3-cell; creates a small “bump” on the back that can tilt the keyboard for more comfortable typing
- Best for: Users who want noticeably longer battery life without going to the largest extended pack
Combined with the internal 24 Wh pack, a 48 Wh external battery gives you around 72 Wh total, which is excellent for business travel and full workdays away from power, depending on your workload and settings.

External T480 Battery – 48Wh Lenovo 01AV427 (61+)
48 Wh 6-cell external battery for ThinkPad T480, a great middle-ground between weight and runtime. Ideal if you regularly work on battery for several hours and want a noticeable upgrade over the 24 Wh pack.
3.3 72Wh external battery – Lenovo 61++ (6-cell extended)
For maximum runtime, Lenovo offers the 72 Wh 6-cell extended battery, commonly known as Battery 61++. This is the “big” option that sticks out further from the back of the laptop but dramatically increases battery life.
Typical characteristics:
- Battery family: 61++ extended 6-cell
- Capacity: 72 Wh, 6-cell
- Shape: Extended pack that raises the rear of the laptop and adds weight
- Best for: Users who work away from power all day – outdoor work, long flights, conferences, field work
Paired with the internal 24 Wh battery, this gives a total of up to 96 Wh capacity, which is about as much as you can reasonably carry in a business notebook under typical airline battery limits.

External T480 Battery – 72Wh Lenovo 61++ (extended)
72 Wh extended external battery for ThinkPad T480. This is the right choice if you need the longest possible runtime and don’t mind extra weight or a larger rear “bump” on the laptop.
4. Quick comparison: T480 battery combinations
Here’s a simple way to look at possible combinations on a T480 with an internal 24 Wh battery:
| External battery | External capacity | Total capacity (internal + external) | Use case |
|---|---|---|---|
| Battery 61 (01AV423, 3-cell) | 24 Wh | ~48 Wh | Lightweight, slim profile, short–medium sessions on battery |
| Battery 61+ (01AV427, 6-cell) | 48 Wh | ~72 Wh | Balanced: solid workday battery for most office tasks |
| Battery 61++ (extended 6-cell) | 72 Wh | ~96 Wh | Maximum runtime for travel, field work and long days without power |
Actual hours will depend heavily on your screen brightness, CPU load, wireless usage and power profile, but the total Wh capacity is a good way to compare options.
5. How to check which batteries your T480 has
Before ordering replacements, it’s smart to confirm which batteries are currently installed.
5.1 Checking the external battery
- Shut down your T480 (or at least disconnect the charger).
- Turn the laptop over and locate the external rear battery.
- Slide the battery release latches and remove the pack.
- On the label, look for the “Battery 61 / 61+ / 61++” marking and the part number (e.g. 01AV423, 01AV427).
Match this number with your replacement choice to be sure of compatibility.
5.2 Checking the internal battery (without opening the laptop)
The internal battery is almost always a 24 Wh pack in the T480. To see its information in Windows without opening the chassis, you can:
- Use Lenovo Vantage or Lenovo Commercial Vantage (on many systems) to view battery details.
- Generate a Powercfg /batteryreport from an elevated Command Prompt to see design capacity and current full charge capacity.
If you’re replacing the internal battery, it’s still a good idea to power off, open the bottom cover carefully and visually confirm the part number before ordering.
6. How to choose the right T480 battery configuration
Here are some practical recommendations based on typical usage:
Office & home users (mostly near a charger)
- Internal: 24 Wh 01AV421
- External: 24 Wh 01AV423 (Battery 61)
- Why: Light weight, slim profile, perfectly fine if you’re usually plugged in or only do short mobile sessions.
Business travelers & students
- Internal: 24 Wh 01AV421
- External: 48 Wh 01AV427 (Battery 61+)
- Why: Great compromise between bulk and runtime. Many users find ~72 Wh total capacity enough for a full working day with moderate loads.
Field work, long flights, power-hungry tasks
- Internal: 24 Wh 01AV421
- External: 72 Wh 61++ extended
- Why: Maximum possible runtime – ideal if you rarely have access to power and don’t mind extra weight and a larger battery bulge.
7. Installation tips and safety
Some quick best practices when replacing T480 batteries:
- External battery:
- Shut down or at least sleep the laptop before swapping.
- Use the rear latches instead of forcing the battery.
- Make sure the new battery clicks firmly into place.
- Internal battery:
- Power off completely and disconnect the AC adapter.
- Use an ESD-safe work area if possible.
- Remove the bottom cover carefully (use the right screwdriver, don’t pry aggressively).
- Disconnect the battery cable before lifting the pack.
- Follow Lenovo’s hardware maintenance manual if you’re not familiar with ThinkPad disassembly.
- After replacement:
- Boot into Windows and check that both batteries are detected correctly.
- Let the system charge to 100%, then use it on battery to verify stable operation.
8. Summary: what battery does the T480 use?
To recap:
- The ThinkPad T480 uses a dual-battery design with:
- Internal battery: 24 Wh 3-cell (FRU 01AV421)
- External battery options:
- 24 Wh 3-cell Battery 61 (01AV423)
- 48 Wh 6-cell Battery 61+ (e.g. 01AV427)
- 72 Wh 6-cell extended Battery 61++
- You can mix a single internal pack with any of the external options to match your weight vs. runtime needs.
- When replacing batteries, always match the part number and confirm physical compatibility.
If your T480 no longer lasts as long as it used to, refreshing the internal 24 Wh pack and choosing the right external 61 / 61+ / 61++ battery is one of the most effective upgrades you can make—keeping a trusted business laptop running strong for years to come.
