In depth comparison and review of Lenovo ThinkBook 15-IIL (20SM) and Lenovo IdeaPad S540-13API (81XC). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of Lenovo ThinkBook 15-IIL (20SM) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price point
solid build quality
decent battery life
good processor performance
adequate storage options
average display quality
limited graphics capability
no thunderbolt support
heavier design
Advantages and disadvantages of Lenovo IdeaPad S540-13API (81XC) based on its technical characteristics, features, user experience, expert reviews and price level.
slim, lightweight design
sharp, vibrant display
fast processing speed
good battery life
quiet operation
limited port selection
no optical drive
average graphics performance
higher price point
| DESIGN AND DIMENSIONS | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.4 cm x 24.5 cm x 1.89 cm | 29.69 cm x 20.86 cm x 1.595 cm |
| Weight | 1.8 kg | 1.25 kg |
| Case Material | Aluminum, polycarbonate ABS | Aluminum, glass |
| Colour | Mineral grey | Light silver |
| DISPLAY | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Screen Size (Type) | 15.6" - IPS | 13.3" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 2560 x 1600 (WQHD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 250 cd/m² | 300 cd/m² |
| Colour Gamut | - | 100% sRGB, 72% NTSC |
| Features | Anti-glare | Glossy, 72% NTSC colour gamut |
| PROCESSOR | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| CPU | Intel Core i5 (10th Gen) 1035G1 / 1 GHz | AMD Ryzen 7 3750H / 2.3 GHz |
|---|---|---|
| Max Turbo Speed | 3.6 GHz | 4 GHz |
| Number of Cores | Quad-Core | Quad-Core |
| Cache | 6 MB | L3 - 4 MB |
| 64-bit Computing | Yes | Yes |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| RAM | 8 GB (1 x 8 GB) | 8 GB (provided memory is soldered) |
|---|---|---|
| Max RAM Supported | 16 GB | - |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2666 MHz | 2400 MHz |
| Rated Speed | 2666 MHz | 2400 MHz |
| Form Factor | SO-DIMM 260-pin | - |
| Slots Qty | 1 | - |
| Empty Slots | 0 | - |
| STORAGE | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2242 PCIe 3.0 x2 - NVM Express (NVMe) | 512 GB SSD M.2 2280 PCIe 3.0 x4 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics | AMD Radeon RX Vega 10 |
|---|---|---|
| Camera | Yes - 720p | Yes - 720p |
| Resolution | - | 1 Megapixel |
| Camera Features | ThinkShutter camera privacy | IR camera, fixed focus, ToF sensor |
| 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 |
| COMMUNICATIONS | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Wireless | Bluetooth 5.0, 802.11a/b/g/n/ac/ax | 802.11a/b/g/n/ac, Bluetooth 5.0 |
|---|---|---|
| Wireless Controller | M.2 Card | M.2 Card |
| Network Interface | Gigabit Ethernet | - |
| Features | Dual stream (2x2) | Dual stream (2x2) |
| BATTERY | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Technology | Lithium Ion | Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 45 Wh | 56 Wh |
| Battery Life | Up to 9 hours | Up to 14.7 hours |
| AC ADAPTER | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt | 65 Watt |
| INPUT | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Type | Keyboard, touchpad | Keyboard, touchpad |
|---|---|---|
| Numeric Keypad | Yes | - |
| Keyboard Backlight | Yes | Yes |
| Features | Spill-resistant, multi-touch touchpad, buttonless touchpad | Multi-touch touchpad, buttonless touchpad |
| CONNECTIONS & EXPANSIONS | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Interfaces | USB 2.0 USB 3.1 Gen 1 (Always On) USB 3.1 Gen 1 USB-C 3.1 Gen 1 USB-C 3.1 Gen 2 (supports DisplayPort Alt Mode) (Power Delivery) HDMI Headphone/microphone combo jack |
USB 3.1 Gen 1 (Always On) 2 x USB-C 3.1 Gen 1 (supports DisplayPort Alt Mode) (Power Delivery) Headphone/microphone combo jack |
|---|---|---|
| Memory Card Reader | 4 in 1 (SD Card, MultiMediaCard, SDHC Card, SDXC Card) | - |
| SOFTWARE | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Operating System (OS) | Windows 10 Pro 64-bit Edition - French | Windows 10 Home 64-bit Edition - English |
|---|---|---|
| Software Included | Microsoft Office (30 days trial) | Microsoft Office (30 days trial) |
| MISCELLANEOUS | Lenovo ThinkBook 15-IIL (20SM) | Lenovo IdeaPad S540-13API (81XC) |
|---|
| Included Accessories | Power adapter | Power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader | Firmware Trusted Platform Module (TPM 2.0) Security Chip |
| Security Slot Type | Kensington security slot | - |
| Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | - |
| Features | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810G tested | Administrator password, hard drive password, power-on password, RapidCharge |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3 | RoHS, Energy-Related Products (ErP) Lot 3 |
| SAR Value | - | 0.599 W/kg (body), 0.599 W/kg (limb) |
| Specific Absorption Rate (SAR) | - | 0.599 W/kg (body) 0.599 W/kg (limb) |
| Manufacturer Warranty | Limited warranty - 1 year - pick-up and return | Limited warranty - 1 year - pick-up and return |
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