In depth comparison and review of Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) and Lenovo ThinkPad E15 Gen 2 (20TD). 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 IdeaPad S145-15AST (Lenovo IdeaPad S145) based on its technical characteristics, features, user experience, expert reviews and price level.
affordable price
lightweight design
adequate connectivity options
solid build quality
simple user interface
mediocre battery life
average display quality
limited graphics performance
slower HDD storage
Advantages and disadvantages of Lenovo ThinkPad E15 Gen 2 (20TD) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
efficient performance
comfortable keyboard
good security features
reasonable price
average display quality
limited graphics power
no thunderbolt support
mediocre battery life
| DESIGN AND DIMENSIONS | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 36.22 cm x 25.15 cm x 1.99 cm | 36.5 cm x 24 cm x 1.89 cm |
| Weight | 1.85 kg | 1.7 kg |
| Case Material | Polycarbonate ABS | Aluminum, polycarbonate ABS |
| Colour | Granite black IMR | Black |
| DISPLAY | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Screen Size (Type) | 15.6" - TN | 15.6" - IPS |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1366 x 768 (HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 220 cd/m² | 250 cd/m² |
| Colour Gamut | - | 45% NTSC |
| Features | Anti-glare | Anti-glare, 170° viewing angle |
| PROCESSOR | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| CPU | AMD A9 9425 / 3.1 GHz | Intel Core i5 (11th Gen) 1135G7 / 2.4 GHz |
|---|---|---|
| Max Turbo Speed | 3.7 GHz | 4.2 GHz |
| Number of Cores | Dual-Core | Quad-Core |
| Cache | 1 MB | 8 MB |
| 64-bit Computing | Yes | Yes |
| Features | Integrated memory controller | Integrated memory controller |
| MEMORY | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| RAM | 4 GB (1 x 4 GB) | 8 GB (1 x 8 GB) |
|---|---|---|
| Max RAM Supported | 8 GB | 32 GB |
| RAM Type | DDR4 SDRAM | DDR4 SDRAM |
| Speed | 2133 MHz | 3200 MHz |
| Rated Speed | 2133 MHz | 3200 MHz |
| Form Factor | SO-DIMM 260-pin | SO-DIMM 260-pin |
| Slots Qty | 1 | 1 |
| Empty Slots | 0 | 0 |
| STORAGE | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Main Storage Size (HDD/SSD) | 128 GB SSD 2.5" (7 mm) SATA 6Gb/s | 256 GB SSD M.2 2242 PCIe 3.0 x4 - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Graphics Processor (GPU) | AMD Radeon R5 | Intel Iris Xe Graphics |
|---|---|---|
| Memory Allocation Technology | - | Shared Video Memory (UMA) |
| Max Monitors Supported | - | 2 external monitor(s) |
| Camera | Yes | Yes - 720p |
| Resolution | 0.3 Megapixel | - |
| Camera Features | - | IR camera, ThinkShutter camera privacy |
| Sound | Stereo speakers, microphone | Stereo speakers, dual array microphone |
| Codec | - | Realtek ALC3287 |
| Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio, Dolby Audio |
| Audio Features | - | Harman/kardon stereo speakers |
| COMMUNICATIONS | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.2 | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 |
|---|---|---|
| Wireless Controller | M.2 Card | Intel Wi-Fi 6 AX 201 - M.2 Card |
| Network Interface | - | Gigabit Ethernet |
| Ethernet Controller | - | Realtek RTL8111H-CG |
| Features | Single stream (1x1) | Dual stream (2x2) |
| BATTERY | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Technology | Lithium Ion | Lithium polymer |
|---|---|---|
| Battery Capacity (Size) | 30 Wh | 45 Wh |
| Battery Life | Up to 4 hours | Up to 10.8 hours |
| AC ADAPTER | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
|---|---|---|
| Output | 45 Watt | 65 Watt |
| INPUT | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Type | Keyboard, touchpad | Keyboard, TrackPoint, UltraNav |
|---|---|---|
| Numeric Keypad | Yes | Yes |
| Keyboard Backlight | - | Yes |
| Features | Multi-touch touchpad, buttonless touchpad | Spill-resistant, multi-touch touchpad, buttonless touchpad, Fn keys with Unified Communications controls |
| CONNECTIONS & EXPANSIONS | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Slots | - | 1 x M.2 Card (1 free) |
|---|---|---|
| Interfaces | USB 2.0 2 x USB 3.1 Gen 1 HDMI Headphone/microphone combo jack |
USB 3.2 Gen 1 (Always On) USB 2.0 USB4 (supports Thunderbolt 4, DisplayPort 1.4 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 IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Operating System (OS) | Windows 10 Home in S mode - English | Windows 11 Pro - English |
|---|---|---|
| Software Included | Microsoft Office (Trial) | - |
| MISCELLANEOUS | Lenovo IdeaPad S145-15AST (Lenovo IdeaPad S145) | Lenovo ThinkPad E15 Gen 2 (20TD) |
|---|
| Included Accessories | Power adapter | USB-C power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM 2.0) Security Chip | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
| 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 | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810H tested |
| Compliant Standards | RoHS, Energy-Related Products (ErP) Lot 3 | RoHS, TUV Rheinland Low Blue Light Certification, Energy-Related Products (ErP) Lot 3 |
| SAR Value | - | 0.438 W/kg (body), 0.438 W/kg (limb) |
| ENERGY STAR Certified | Yes | Yes |
| EPEAT Compliant | - | EPEAT Gold |
| TCO Certified | - | TCO Certified Notebooks 8 |
| 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 | Limited warranty - 1 year - pick-up and return |
| Model Number | 15AST 81N3 | - |
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