Lenovo ThinkBook 15 Gen 4 Business Laptop (15.6" IPS FHD Touchscreen, Intel 10-Core i7-1255U, 16GB RAM, 512GB SSD), FHD Webcam, Narrow Bezel, Backlit, Fingerprint, Thunderbolt 4, Win 11 Pro, Grey
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
This is a highly upgradeable, port-heavy business laptop perfect for spreadsheet warriors who stay plugged in, but the weak battery makes it terrible for travel.
The ThinkBook 15 Gen 4 shines as a stationary workstation thanks to its Thunderbolt 4 port, dual SSD slots, and numeric keypad. The 45Wh battery and 45% NTSC screen severely limit its usefulness for travel or creative work.
If you need all-day battery or color accuracy, look for a laptop with at least a 70Wh battery and a 100% sRGB display panel.
Regret Score™
Medium RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Packs two M.2 Gen 4 SSD slots and an open SODIMM slot for easy storage and RAM upgrades
- Includes a massive port selection with Thunderbolt 4, HDMI 2.1, and a physical RJ45 ethernet jack
- The Intel i7-1255U processor maintains a stable 28W load under pressure while staying cool at 66°C
- Fingerprint reader is built directly into the power button for instant, secure logins
- Aluminum top lid provides a premium feel and resists flexing
Cons
- The tiny 45Wh battery barely manages 5 to 6 hours of real-world video playback
- The plastic bottom chassis feels soft and cheap compared to the aluminum lid
- Display only covers 45% NTSC color gamut, making colors look washed out
- Key travel on the backlit keyboard is noticeably shallow for a business-focused machine
Dimension Scores
The i7-1255U easily handles heavy multitasking and maintains a 28W load without thermal throttling.
The 300-nit IPS panel offers great viewing angles, but the 45% NTSC color gamut looks washed out.
The 45Wh battery struggles to hit 6 hours of basic web browsing, falling far behind competitors.
At 3.74 lbs it is reasonably light, but the plastic bottom half feels flimsy compared to the aluminum lid.
Best For
- Accountants or data analysts who need a physical number pad and multiple external monitors
- IT professionals who want a physical RJ45 ethernet port for network troubleshooting
- Home office setups where the laptop stays plugged into a Thunderbolt 4 dock
Not Recommended For
- Frequent travelers who need all-day battery life away from a wall outlet
- Graphic designers or photographers who need accurate sRGB color reproduction
Watch Out For
- The 45Wh battery drains incredibly fast out of the box — you need to run several Windows and BIOS updates to stabilize the drain.
- Multiple users report recurring Blue Screen of Death (BSOD) issues that sometimes require a motherboard replacement.
- The hinge is too stiff to open with one hand, requiring you to hold the base down every time.
- The Mylar touchpad surface feels smooth but occasionally suffers from delayed responsiveness.
Full Specifications
| RAM | 16 GB DDR4 |
| ASIN | B09Q8LMW5Z |
| Brand | ist computers |
| Color | 15.6" Touchscreen|Core i7 |
| Series | Lenovo ThinkBook 15 G4 IAP |
| Voltage | 230 Volts |
| Batteries | 1 Lithium Ion batteries required. (included) |
| CPU Model | Core i7 |
| Processor | 1.7 GHz core_i7 |
| Hard Drive | 512 GB SSD |
| Model Name | Lenovo ThinkBook 15 G4 IAP |
| Item Weight | 3.74 pounds |
| Screen Size | 15.6 Inches |
| Memory Speed | 3200 MHz |
| Power Source | AC & Battery |
| Chipset Brand | Intel |
| Wireless Type | 802.11ax, Bluetooth |
| Hard Disk Size | 512 GB |
| Processor Brand | Intel |
| Special Feature | Anti Glare Coating, Backlit Keyboard, Fingerprint Reader, Numeric Keypad, Touchscreen |
| Card Description | Integrated |
| Operating System | Windows 11 Pro |
| Flash Memory Size | 512 GB |
| Hardware Platform | PC |
| Item model number | ThinkBook 15 Gen 4 |
| Screen Resolution | 1920 x 1080 pixels |
| Optical Drive Type | No Optical Drive |
| Product Dimensions | 14.05 x 9.25 x 0.74 inches |
| Computer Memory Type | DDR4 SDRAM |
| Graphics Coprocessor | Intel Iris Xe Graphics |
| Hard Drive Interface | Solid State |
| Number of Processors | 10 |
| Max Screen Resolution | 1920x1080 Pixels |
| Graphics Card Ram Size | 16 GB |
| Item Dimensions LxWxH | 14.05 x 9.25 x 0.74 inches |
| Number of USB 3.0 Ports | 3 |
| Graphics Card Description | Integrated |
| Ram Memory Installed Size | 16 GB |
| Standing screen display size | 15.6 Inches |
| Average Battery Life (in hours) | 6 Hours |
What Buyers Say
The most glaring takeaway from owners is the abysmal battery life, with many shocked that a business laptop dies in under 6 hours. Buyers love the extensive port selection, specifically calling out the RJ45 ethernet and Thunderbolt 4 for easy docking. The fingerprint reader in the power button gets universal praise for its speed. Several users experienced frustrating Blue Screen of Death (BSOD) loops that required warranty repairs. The keyboard is generally well-liked for its layout, though typists note the key travel is shallower than older ThinkPads.
“Super fast for my spreadsheets and I love the ports, but the battery drains so fast I can't even make it through a half day of meetings without my charger.”
Common Praise
- Fingerprint reader in the power button logs you in instantly upon waking
- Thunderbolt 4 port makes connecting to dual-monitor desk docks seamless
- Runs incredibly quiet and cool even when compiling code or running heavy Excel macros
- Upgrading the RAM and adding a second SSD takes less than 10 minutes
Common Complaints
- Battery routinely dies in 5 hours during basic web browsing and email
- Bottom plastic chassis flexes easily when picking the laptop up by the corner
- Screen colors look dull and washed out due to the low 45% NTSC color gamut
- Random BSOD crashes occur for some users right out of the box
Ownership Tips
- You must run all Lenovo Vantage system updates immediately to fix initial battery drain bugs
- The Mylar touchpad can feel slightly laggy until you adjust the Windows sensitivity settings
- Opening the laptop requires two hands because the hinge is incredibly stiff
Frequently Asked Questions
Can I upgrade the RAM and storage later?
Yes. It has 8GB soldered but includes one open SODIMM slot to add up to 32GB more. It also has two M.2 PCIe Gen 4 slots for SSDs.
Does it support dual monitors?
You can run up to three external 4K monitors at 60Hz using the HDMI 2.1 and Thunderbolt 4 ports.
How long does the battery actually last?
Real-world testing shows about 5 to 6 hours for basic web browsing and video playback due to the small 45Wh battery.
Is the chassis made of metal or plastic?
It has a dual-tone aluminum top lid, but the bottom base and keyboard deck are made of plastic.
Can I charge it via USB-C?
Yes, the Thunderbolt 4 port supports Power Delivery, so you can charge it with a compatible USB-C charger or dock.
Does the webcam have Windows Hello facial recognition?
No, but it does have a physical privacy shutter and a fingerprint reader built into the power button for secure logins.
Buying Guide
You are buying a desktop replacement, not a travel companion. The ThinkBook 15 Gen 4 gives you the ports, upgradeability, and processing power of a much thicker machine, but sacrifices battery capacity to keep the price down. If you plan to keep this plugged into a monitor on your desk 90% of the time, it is a fantastic workhorse. If you work from coffee shops or airports, you will be constantly hunting for an outlet.
45Wh Battery
Think of this like a tiny gas tank in a V8 truck. Even though the processor is efficient, the battery is physically too small to provide all-day power.
Thunderbolt 4
This is a super-highway cable connection. It lets you plug in one single cord to charge the laptop, connect two 4K monitors, and use a wired mouse and keyboard all at once.
45% NTSC Color Gamut
This measures how many colors the screen can display. At 45%, reds will look slightly orange and greens will look muted, making it bad for editing photos but fine for reading text.
SODIMM RAM Slot
Unlike many modern laptops that permanently glue the memory inside, this has a pop-out slot so you can easily add more RAM yourself in a few years.
Alternatives
If you need better battery life and a color-accurate screen, look for a 14-inch business laptop with an AMD Ryzen 7 processor, a 70Wh+ battery, and a 100% sRGB display.
You Might Also Like
Apple 2026 MacBook Air 13-inch Laptop with M5 chip: Built for AI, 13.6-inch Liquid Retina Display, 16GB Unified Memory, 512GB SSD, 12MP Center Stage Camera, Touch ID, Wi-Fi 7; Midnight
$600+This 2.71-pound MacBook Air with a 13.6-inch Liquid Retina display and M5 chip is for users needing powerful AI capabilities and up to 18 hours of battery life.
Apple 2026 MacBook Pro Laptop with Apple M5 Pro chip with 18-core CPU and 20-core GPU: Built for AI, 16.2-inch Liquid Retina XDR Display, 24GB Unified Memory, 1TB SSD, Wi-Fi 7; Space Black
$600+This 16.2-inch MacBook Pro with an 18-core M5 Pro CPU and 20-core GPU is for professionals needing extreme AI performance and up to 27 hours of battery life.
Apple 2026 MacBook Air 15-inch Laptop with M5 chip: Built for AI, 15.3-inch Liquid Retina Display, 16GB Unified Memory, 512GB SSD, 12MP Center Stage Camera, Touch ID, Wi-Fi 7; Midnight
$600+This 3.32-pound MacBook Air with an M5 chip and 15.3-inch Liquid Retina display is for users needing powerful AI capabilities and up to 18 hours of battery life.
HP OmniBook 5 16” Touchscreen AI Laptop – Intel Core Ultra 7 Processor, 16GB RAM, 1TB SSD, Windows 11, Copilot AI, Wi-Fi 6E, Backlit Keyboard, Silver
$600+This 16-inch touchscreen laptop with an Intel Core Ultra 7, 16GB LPDDR5 RAM, and 1TB SSD is for users needing a mid-range AI-accelerated machine for productivity and light creative tasks.