Lenovo IdeaPad Slim 3 (15IRU10) vs Lenovo IdeaPad Slim 3 15 (N100)
The Lenovo IdeaPad Slim 3 is the better laptop on paper: it has more memory, has more storage and has a faster SSD. The Lenovo IdeaPad Slim 3 15 doesn't beat it on any spec that matters.
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Key differences
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Performance
Lenovo IdeaPad Slim 3 wins
Same class of processor, but the Lenovo IdeaPad Slim 3 has more memory (8 GB against 4 GB).
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Gaming
Evenly matched
Neither is made for modern games.
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Display
Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 has the better screen: 15.3" Full HD 300 nits against 15.6" Full HD 250 nits.
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Battery life
Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 should last longer: up to 14.5 hours against up to 11.7 hours.
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Connectivity
Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 is better connected. It has newer Wi-Fi 7.
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Portability
Evenly matched
About the same to carry: 1.59 kg and 1.55 kg.
Other differences
- Memory Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 has 8 GB of memory against 4 GB, so it has more room for big projects and heavy multitasking.
- Storage Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 has twice the storage: 256 GB against 128 GB.
- Storage type Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 uses a proper SSD, while the Lenovo IdeaPad Slim 3 15 has slower eMMC-style flash storage, so apps open and update more slowly.
- Age Lenovo IdeaPad Slim 3 wins
The Lenovo IdeaPad Slim 3 is the newer model (2025 against 2023).
Which one should you choose?
Choose the Lenovo IdeaPad Slim 3 if…
- You keep lots of tabs and apps open: 8 GB of memory gives it more room than 4 GB.
- You store lots of photos, videos or games: it has 256 GB of storage.
- You want apps and updates to feel quick: it has a proper SSD.
- You want a more recent design: it came out in 2025.
Choose the Lenovo IdeaPad Slim 3 15 if…
- You mostly browse, stream and write: its Intel N100 copes well with everyday tasks.
- You want a big screen: it's 15.6 inches.
- You work with numbers: it has a number pad.
Full spec comparison
The Lenovo IdeaPad Slim 3 leads on performance; elsewhere the two are closely matched.
Green cells with a ✓ mark the better spec in that row. Tick "Show differences only" to hide the rows where they match.
Performance
The Lenovo IdeaPad Slim 3 is ahead on performance.
It has more memory, has more storage and has a faster SSD, and the Lenovo IdeaPad Slim 3 15 doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Processor | Intel Core 3 100U | Intel N100 |
| Graphics | Intel Graphics | Intel UHD Graphics |
| Memory (RAM) | 8 GB | 4 GB |
| Memory type | DDR5-4800 | LPDDR5-4800 |
| Maximum memory | 24 GB | 4 GB |
| Memory upgrades | Partly upgradeable | Soldered (not upgradeable) |
| Storage | 256 GB | 128 GB |
| Storage type | SSD | UFS |
| Storage interface | PCIe 4.0 x4 NVMe M.2 2242 | UFS 3.1 |
| Storage slots | 2 | 0 |
Screen
The Lenovo IdeaPad Slim 3 is ahead on the screen.
It has a brighter screen, and the Lenovo IdeaPad Slim 3 15 doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Screen size | 15.3" | 15.6" |
| Resolution | Full HD+ (1920 x 1200) | Full HD (1920 x 1080) |
| Aspect ratio | 16:10 | 16:9 |
| Panel | IPS | TN |
| Refresh rate | 60 Hz | 60 Hz |
| Brightness | 300 nits | 250 nits |
| Colour range | 45% NTSC | 45% NTSC |
| HDR | None | None |
| Finish | Matte | Matte |
| Touchscreen | No | No |
Battery and size
The Lenovo IdeaPad Slim 3 is ahead on battery and weight.
It charges over USB-C, and the Lenovo IdeaPad Slim 3 15 doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Battery life (maker claim) | Up to 14.5 hours | Up to 11.7 hours |
| Battery capacity | 50 Wh | 47 Wh |
| Charger | 65 W | 65 W |
| Charges via | USB-C (USB PD) and round-tip power connector | round tip |
| Fast charging | Rapid Charge Boost: 2 hours of runtime from a 15-minute charge | Rapid Charge Boost: 2 hours runtime from 15 minutes |
| Weight | 1.59 kg | 1.55 kg |
| Dimensions | 343.4 x 239.5 x 16.9-17.9 mm | 359.3 x 235 x 17.9 mm |
| Materials | Aluminium top cover, PC-ABS bottom | PC-ABS top and bottom |
| Durability | MIL-STD-810H | MIL-STD-810H (20 tests) |
| Colour | Luna Grey | Abyss Blue |
| Colours available | Cosmic Blue, Luna Grey | Abyss Blue, Arctic Grey, Frost Blue |
Ports and wireless
The Lenovo IdeaPad Slim 3 is ahead on ports and wireless.
It has Wi-Fi 7, and the Lenovo IdeaPad Slim 3 15 doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Ports | 2x USB-A 3.2 Gen 1 (5Gbps), 1x USB-C 3.2 Gen 1 (5Gbps, charging via USB PD 45-65W, DisplayPort 1.2), 1x HDMI 1.4, 1x 3.5 mm headphone/microphone combo, 1x SD card reader, 1x round-tip power connector | 2x USB-A 3.2 Gen 1, 1x USB-C 3.2 Gen 1 (USB PD 45-65W, DisplayPort 1.2), 1x HDMI 1.4, 1x 3.5 mm audio, 1x SD card reader, 1x round-tip power connector |
| Thunderbolt / USB4 | None | None |
| External displays (max) | 2 | 2 |
| Card reader | SD | SD |
| Ethernet | None | None |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 6 |
| Bluetooth | Bluetooth 5.4 | Bluetooth 5.2 |
| Mobile data | None | None |
Features
Both have much the same extras.
From the keyboard to the webcam and login, there is little between them.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Webcam | 1080p + IR | 1080p |
| Webcam privacy | physical shutter | physical shutter |
| Backlit keyboard | No | No |
| Keyboard | 6-row, multimedia Fn keys, 1.3 mm key travel, numeric keypad, Copilot key | UK English, non-backlit, numeric keypad |
| Login | Face | — |
| Number pad | Yes | Yes |
| Touchpad | Buttonless Mylar surface, multi-touch, Precision TouchPad, 75 x 120 mm | Mylar, 69 x 104 mm |
| Speakers | Stereo, 2x 2 W, Dolby Audio | 2x 1.5 W, Dolby Audio |
| Microphones | dual-microphone array | dual-array |
| Pen | No | No |
| Security | TPM 2.0 (firmware), Camera privacy shutter, Windows Hello IR camera | firmware TPM 2.0 |
Software and model
The Lenovo IdeaPad Slim 3 is ahead on software and updates.
It is newer, and the Lenovo IdeaPad Slim 3 15 doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Slim 3 (15IRU10) | Lenovo IdeaPad Slim 3 15 (N100) |
|---|---|---|
| Operating system | Windows 11 Home | Windows 11 Home in S mode |
| Model number | 83KD000TUK | 82XB009LUK |
| Released | 2025 | 2023 |