Lenovo IdeaPad Slim 3i 15 vs Razer Blade 18 (2025)
44Performance65.6
23.3Display55.5
29.3Battery98.7
67.7Portability20
2 spec wins — Lenovo IdeaPad Slim 3i 157 spec wins — Razer Blade 18 (2025)
InnoReviews verdict
Razer Blade 18 (2025) wins this laptop face-off, 62.2 to 39.9, pulling ahead mainly in battery (+69) and display (+32). Lenovo IdeaPad Slim 3i 15 still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the Lenovo IdeaPad Slim 3i 15
- Stronger portability score: 68 vs 20
- 48% lower weight: 1.62 kg vs 3.1 kg
- 36% lower thickness: 17.9 mm vs 27.9 mm
- Lower launch price: $549 vs $3,500
Reasons to pick the Razer Blade 18 (2025)
- Stronger performance score: 66 vs 44
- Stronger display score: 56 vs 23
- Stronger battery score: 99 vs 29
- 515% higher charging: 400 W vs 65 W
- 300% higher Refresh rate: 240 Hz vs 60 Hz
Display
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Screen size | 15.6 ″ | 18 ″+15% |
| Panel type | IPS | IPS |
| Resolution | 1920x1080 | 3840x2400 |
| Refresh rate | 60 Hz | 240 Hz+300% |
| Peak brightness | 300 nits | 500 nits+67% |
Performance
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Processor | Intel Core i5-1335U | Intel Core Ultra 9 275HX |
| Graphics | Intel Iris Xe Graphics | NVIDIA GeForce RTX 5070 Ti Laptop |
| RAM | 16 GB | 32 GB+100% |
| RAM type | LPDDR5 | DDR5-5600 SO-DIMM (2 slots) |
| Storage | 512 GB | 1,024 GB+100% |
| Storage type | NVMe SSD | PCIe 4.0 NVMe SSD (2 slots) |
Benchmarks
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Geekbench 6 (single) | — | 3,127Top 15% |
| Geekbench 6 (multi) | — | 20,220Top 11% |
Battery
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Capacity | 47 Wh | 99 Wh+111% |
| Charging | 65 W | 400 W+515% |
Design
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Weight | 1.62 kg+48% | 3.1 kg |
| Thickness | 17.9 mm+36% | 27.9 mm |
| Material | Polycarbonate | CNC aluminum (recycled) |
Connectivity
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Ports | 1x USB-C 3.2 Gen 1, 2x USB-A 3.2 Gen 1, 1x HDMI 1.4, 1x SD card reader, 1x 3.5mm combo audio | 1x Thunderbolt 5, 1x Thunderbolt 4, 3x USB-A 3.2 Gen 2, HDMI 2.1, 2.5G Ethernet, SD (UHS-II), 3.5mm |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 7 |
| Bluetooth | 5.1 | 5.4 |
| Webcam | 1080p | 5MP + IR |
| Biometrics | Fingerprint reader | IR face (Windows Hello) |
Software
| Spec | Lenovo IdeaPad Slim 3i 15 | Razer Blade 18 (2025) |
|---|---|---|
| Operating system | Windows 11 Home | Windows 11 |
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