Detailed comparison and review of Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) and Lenovo ThinkPad E15 Gen 4 (21ED). With our comprehensive overview, you can simply compare dimensions, performance, storage, functions, but also other key features of both laptops and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the laptop that best fits your needs and expectations.
Advantages and disadvantages of Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) based on its technical characteristics, features, user experience, expert reviews and price level.
solid build quality
efficient multitasking performance
affordable price point
adequate port selection
fast charging support
average display quality
modest battery life
heavier design
no thunderbolt support
Advantages and disadvantages of Lenovo ThinkPad E15 Gen 4 (21ED) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
efficient performance
comfortable keyboard
good security features
affordable price
average display quality
limited graphics power
moderate battery life
noisy under load
| DESIGN AND DIMENSIONS | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.4 cm x 24.5 cm x 1.89 cm | 36.5 cm x 24 cm x 1.89 cm |
| Weight | 1.8 kg | 1.78 kg |
| Case Material | Aluminum, polycarbonate ABS | Aluminium (top), polycarbonate ABS (bottom) |
| Colour | Mineral grey | Black |
| DISPLAY | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Screen Size (Type) | 15.6" - TN | 15.6" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 220 cd/m² | 300 cd/m² |
| Features | Anti-glare, Wide Viewing Angle | Anti-glare, 170° viewing angle |
| PROCESSOR | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| CPU | Intel Core i3 (10th Gen) 1005G1 / 1.2 GHz | AMD Ryzen 5 5625U / 2.3 GHz |
|---|---|---|
| Max Turbo Speed | 3.4 GHz | 4.3 GHz |
| Number of Cores | Dual-Core | 6-core |
| Cache | 4 MB | L3 - 16 MB |
| 64-bit Computing | Yes | - |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| RAM | 4 GB (1 x 4 GB) | 8 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 16 GB | 40 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2666 MHz | 3200 MHz |
| Rated Speed | 2666 MHz | 3200 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 1 | 1 |
| Empty Slots | 0 | 1 |
| STORAGE | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Main Storage Size (HDD/SSD) | 128 GB SSD M.2 2242 PCIe - SanDisk | 256 GB SSD M.2 2242 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics | AMD Radeon Graphics |
|---|---|---|
| Max Monitors Supported | - | 2 external monitor(s) |
| Camera | Yes - 720p | Yes - 1080p |
| Camera Features | ThinkShutter camera privacy | Privacy shutter, IR camera, Windows Hello, fixed focus |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | Realtek ALC3287 | Realtek ALC3287 |
| Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio, Dolby Audio |
| Audio Features | - | Harman-branded |
| COMMUNICATIONS | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Wireless | Bluetooth 5.0, 802.11a/b/g/n/ac/ax | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 |
|---|---|---|
| Wireless Controller | Intel Wi-Fi 6 AX 201 - M.2 Card | M.2 Card |
| Network Interface | Gigabit Ethernet | Gigabit Ethernet |
| Ethernet Controller | - | Realtek RTL8111H-CG |
| Features | - | Wake-on-LAN (WOL), dual stream (2x2) |
| BATTERY | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Technology | 3-cell Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 45 Wh | 57 Wh |
| Battery Life | Up to 9 hours | Up to 16.5 hours |
| AC ADAPTER | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt, 20 V, 3.25 A | 65 Watt |
| INPUT | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Type | Keyboard, touchpad | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | - | Yes |
| Features | Spill-resistant, multi-touch touchpad, buttonless touchpad | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Slots | - | 2 x M.2 Card (1 free) |
|---|---|---|
| Interfaces | USB 2.0 USB 3.2 Gen 1 (Always On) USB 3.2 Gen 1 USB-C 3.2 Gen 1 USB-C 3.2 Gen 2 (supports DisplayPort Alt Mode) (Power Delivery) HDMI Headphone/microphone combo jack |
USB 2.0 USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 1 (supports DisplayPort 1.2 Alt Mode) (Power Delivery 3.0) HDMI LAN Headphone/microphone combo jack |
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) | - |
| SOFTWARE | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition - English | Windows 11 Pro - English |
|---|
| MISCELLANEOUS | Lenovo ThinkBook 15-IIL (Lenovo ThinkBook 15) | Lenovo ThinkPad E15 Gen 4 (21ED) |
|---|
| Included Accessories | Power adapter | USB-C power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Discrete Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
| Security Slot Type | Kensington security slot | Kensington security slot |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | Security lock slot (cable lock sold separately) |
| Features | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810G tested | Administrator password, power-on password, MIL-STD-810H tested, self-healing BIOS, NVMe password |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3 | RoHS, Energy-Related Products (ErP) Lot 3, TCG Certified, TUV Rheinland Low Blue Light (Software Solution) |
| ENERGY STAR Certified | Yes | Yes |
| EPEAT Compliant | EPEAT Silver | EPEAT Gold |
| Max Operating Temperature | - | 35 °C |
| Min Operating Temperature | - | 5 °C |
| Humidity Range Operating | - | 8 - 95% |
| Manufacturer Warranty | - | Base warranty - 1 year - pick-up and return Extended warranty - 1 year - on-site |
| Model Number | IIL 20SM | - |
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