LENOVO Thinkbook 15, [21DJ00C9AU], I7-1255U, 15.6″ FHD, 512GB SSD, 16GB, GeForce MX550, W10P64, 1YOS
THINKBOOK 15 GEN 4 15.6IN FHD I7-1255U 16GB RAM 512SSD MX550 WIN10 PRO/ WIN11 PRO 1 YEAR ONSITE
ThinkBook Series | Built for business, designed for you
These laptops make it easy to do business with style. From options that keep you up and running without pause, to security that works behind the scenes. And that’s not all-ThinkBook laptops are built with premium materials like anodized aluminum with dual-tone finish.
Features
- NVIDIA GeForce MX550 2 GB discrete graphic card provides excellent ability in a variety of multimedia applications and user experiences
- Intel Core i7 1.70 GHz processor provides lightning fast speed and peak performance for the toughest of tasks and games
- 8 Hours battery run time helps you stay unwired and work longer non-stop
- 15.6″ display with 1920 x 1080 resolution showcases movies, games and photos with impressive clarity
Features
Standout performance & looks
Equipped with up to 10th Gen Intel® Core™ processing and Windows 10 Pro, the ThinkBook 15 gives you seamless high performance and responsiveness—wherever you are. Just 18.9mm (0.74″) thin, this stylish business laptop boasts a modern mineral grey finish.
Optional features, optimal results
To help make your life easier, the ThinkBook 15 has a number of optional features. With a solid-state drive, everything runs far faster. With an integrated fingerprint reader on the Smart Power Button, you can log in or boot up instantly. And with our IT support services, you can enjoy extra peace of mind, too.

More bang for your buck
As the ThinkBook 15 has narrow bezels and an 83% screen-to-body ratio, you can focus more on the stunning 15.6-inch FHD display. You’ll also get to experience rich, clear sound through two Dolby Audio™ speakers. And if you work with complex visuals or like to game in your downtime, go with the discrete graphics card option.
Making your life easier
With the ThinkBook 15, video calls are a snap thanks to the dual-array Skype-certified mic and built-in speakers. And with the USB 3.1 (Gen2, Type-C) port, data transfers are lightning quick and large media files load in no time.

All the right connections
When you’re on the go, the USB 3.1 port with an always-on function can recharge other devices—even if your ThinkBook is turned off. The USB 2.0 port is within a compartment that can store a wireless mouse dongle (sold separately) to prevent it getting lost or damaged.
A laptop your business can count on
The security-minded ThinkBook 15 has ThinkShutter, so you can physically close your webcam. In addition, each ThinkBook undergoes durability and reliability tests to ensure it can withstand extreme temperatures and vibrations.
Maximum Battery Run Time | 8 Hours |
Chipset Manufacturer | Intel |
Maximum Power Supply Wattage | 65 W |
Additional Warranty Information |
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Finger Print Reader | Yes |
Front Camera/Webcam | Yes |
Keyboard Backlight | Yes |
Keyboard Localization | English |
Bluetooth | Yes |
Wireless LAN | Yes |
Wireless LAN Standard | IEEE 802.11ax |
Ethernet Technology | Gigabit Ethernet |
Drive Type | SSD |
Optical Drive Type | No |
Total Solid State Drive Capacity | 512 GB |
SSD Form Factor | NVMe M.2 PCI Express |
Operating System | Windows 11 |
Operating System Architecture | 64-bit |
Operating System Platform | Windows |
Operating System Language | English |
Downgradable Operating System | Windows 10 Pro |
Weight (Approximate) | 1.70 kg |
Height | 18.90 mm |
Width | 357 mm |
Depth | 235 mm |
Product Color | Mineral Gray |
Number of Free Memory Slots | 0 |
Number of Occupied Memory Slots | 1 |
On-board Memory | 8 GB |
On-board Memory Technology | DDR4 SDRAM |
On-board Memory Configuration | 1 x 8GB |
Total Installed System Memory | 16 GB |
Maximum Supported System Memory | 40 GB |
System Memory Technology | DDR4 SDRAM |
System Memory Speed | 3200 MHz |
System Memory Form Factor | On-board |
Installed Slot Memory Configuration | 1 x 8GB |
Total Number of Memory Slots | 1 |
Installed Slot Memory | 8 GB |
HDMI | Yes |
Network (RJ-45) | Yes |
Total Number of USB Ports | 3 |
Number of USB 3.2 Gen 1 Ports | 2 |
Number of USB 3.2 Gen 2 Type-C Ports | 1 |
Number of Thunderbolt 4 Ports | 1 |
Package Contents |
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Features | Anti-glare Screen |
Environmentally Friendly | Yes |
Environmental Certification | RoHS |
EPEAT Gold | |
ErP Lot 3 | |
ENERGY STAR 8.0 | |
Energy Star | Yes |
Processor Speed | 1.70 GHz |
Processor Type | Core i7 |
Processor Model | i7-1255U |
Processor Core | Deca-core (10 Core) |
Processor Manufacturer | Intel |
vPro Technology | No |
Maximum Turbo Speed | 4.70 GHz |
Processor Generation | 12th Gen |
Product Type | Notebook |
Manufacturer Part Number | 21DJ00C9AU |
Manufacturer Website Address | http://www3.lenovo.com/au/en |
Manufacturer | Lenovo Group Limited |
Product Model | 21DJ00C9AU |
Product Name | ThinkBook 15 G4 IAP 21DJ00C9AU |
Product Line | ThinkBook |
Product Series | 15 G4 IAP |
Brand Name | Lenovo |
Screen Resolution | 1920 x 1080 |
Screen Size | 15.6″ |
Screen Mode | Full HD |
Touchscreen | No |
Graphics Controller Manufacturer | NVIDIA |
Graphics Controller Model | GeForce MX550 |
Graphics Memory Capacity | 2 GB |
Graphics Memory Technology | GDDR6 |
Graphics Memory Accessibility | Dedicated |
Display Screen Technology | In-plane Switching (IPS) Technology |