Side by side comparison and review of Lenovo IdeaPad S540-15IML (81NG) and Lenovo ThinkPad L15 Gen 4 (21H3). Compare dimensions, processors, batteries, storage capacities and other key specifications and features to simplify the choice of your perfect laptop. Our goal is to make it easier for you to decide on the laptop that will best meet your expectations by revealing the main differences between the products.
Advantages and disadvantages of Lenovo IdeaPad S540-15IML (81NG) based on its technical characteristics, features, user experience, expert reviews and price level.
sleek aluminum design
sharp full HD display
fast processing speeds
ample storage capacity
good battery life
heavier than competitors
no optical drive
limited port selection
average graphics performance
Advantages and disadvantages of Lenovo ThinkPad L15 Gen 4 (21H3) based on its technical characteristics, features, user experience, expert reviews and price level.
robust connectivity options
supports fast charging
dedicated nvidia gpu
upgradeable ram and storage
solid build quality
average battery capacity
basic 250-nit display
limited cpu performance
no fingerprint reader
| DESIGN AND DIMENSIONS | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Product Type | Notebook | Notebook - 180-degree hinge design |
|---|---|---|
| Dimensions (WxDxH) | 35.8 cm x 24.5 cm x 1.69 cm | 36.02 cm x 23.7 cm x 1.993 cm |
| Weight | 1.95 kg | 1.77 kg |
| Case Material | Aluminum, glass | Polycarbonate ABS (bottom), polycarbonate ABS (top) |
| Colour | Mineral grey | Thunder black |
| DISPLAY | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Screen Size (Type) | 15.6" - IPS | 15.6" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | - |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| V-Sync Rate at Max Res. | - | 60 Hz |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 300 cd/m² | 250 cd/m² |
| Colour Gamut | 72% | 45% NTSC |
| Features | Glossy, glass cover | Anti-glare |
| PROCESSOR | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| CPU | Intel Core i5 (10th Gen) 10210U / 1.6 GHz | Intel Core i5 (13th Gen) 1335U / 1.3 GHz |
|---|---|---|
| Max Turbo Speed | 4.2 GHz | 4.6 GHz |
| Number of Cores | Quad-Core | 10-core |
| Cache | 6 MB | 12 MB |
| 64-bit Computing | Yes | - |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| RAM | 8 GB (1 x 4 GB + 4 GB (soldered)) | 16 GB (1 x 16 GB) |
|---|---|---|
| Max RAM Supported | 12 GB | 64 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2400 MHz | 3200 MHz |
| Rated Speed | 2400 MHz | 3200 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 1 | 2 |
| Empty Slots | 0 | 1 |
| STORAGE | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Main Storage Size (HDD/SSD) | 512 GB SSD M.2 2280 PCIe 3.0 x4 - NVM Express (NVMe) | 256 GB SSD M.2 2242 PCIe 4.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics | Intel Iris Xe Graphics |
|---|---|---|
| Max Monitors Supported | - | 3 external monitor(s) |
| Video System Features | - | Functions as Intel UHD graphics (for single-channel memory) |
| Camera | Yes - 720p | Yes - 1080p |
| Resolution | 1 Megapixel | - |
| Camera Features | Privacy shutter | Privacy shutter, Windows Hello, fixed focus, hybrid FHD/IR camera |
| Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3287 |
| Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio, Dolby Audio |
| Audio Features | - | Input: Dolby Voice, far-field |
| COMMUNICATIONS | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.2 | 802.11a/b/g/n/ac/ax, Bluetooth 5.1 |
|---|---|---|
| Wireless Controller | M.2 Card | Intel Wi-Fi 6 AX 201 - M.2 Card |
| Network Interface | - | Gigabit Ethernet |
| Ethernet Controller | - | Intel I219-V |
| Features | Dual stream (2x2) | Wake-on-LAN (WOL), dual stream (2x2) |
| WWAN |
|---|
| Generation | - | 4G upgradable |
|---|
| BATTERY | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Technology | Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 70 Wh | 57 Wh |
| Battery Life | Up to 15 hours | - |
| AC ADAPTER | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt | 65 Watt |
| INPUT | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Type | Keyboard, touchpad | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | Yes | Yes |
| Features | Multi-touch touchpad, buttonless touchpad | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls |
| CONNECTIONS & EXPANSIONS | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Interfaces | USB 3.1 Gen 1 USB 3.1 Gen 1 (Always On) USB-C 3.1 Gen 1 HDMI Headphone/microphone combo jack |
USB 3.2 Gen 1 USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 2 (supports DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) USB4 (supports Thunderbolt 4, DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) HDMI (4K support) LAN Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) | Yes (microSD) |
| SOFTWARE | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| Operating System (OS) | Windows 10 Home 64-bit Edition - English | Windows 11 Pro - English |
|---|---|---|
| Software Included | Microsoft Office (30 days trial) | - |
| MISCELLANEOUS | Lenovo IdeaPad S540-15IML (81NG) | Lenovo ThinkPad L15 Gen 4 (21H3) |
|---|
| 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, smart card reader |
| Security Slot Type | - | Kensington nano security slot |
| Theft/Intrusion Protection | - | Security lock slot (cable lock sold separately) |
| Features | Administrator password, hard drive password, power-on password, RapidCharge | Administrator password, power-on password, RapidCharge, MIL-STD-810H tested, self-healing BIOS, NVMe password |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3 | RoHS, Energy-Related Products (ErP) Lot 6, TCG Certified, Energy-Related Products (ErP) Lot 26, TCO Certified 9.0 |
| SAR Value | 1.81 W/kg (body), 1.81 W/kg (limb) | - |
| Max Operating Temperature | - | 35 °C |
| Min Operating Temperature | - | 5 °C |
| Humidity Range Operating | - | 8 - 95% |
| Manufacturer Warranty | Limited warranty - 1 year - pick-up and return | Base warranty - 1 year - pick-up and return Extended warranty - 1 year - on-site - response time: next business day |
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