Lenovo IdeaPad Duet 3 Chromebook vs ASUS Chromebook CM30 Detachable
The ASUS Chromebook CM30 Detachable is the better laptop on paper: it gets updates for longer and has a bigger battery. Pick the Lenovo IdeaPad Duet 3 Chromebook only if it matters to you that it has a slightly bigger screen.
We earn a commission from qualifying Amazon purchases made through our links, at no extra cost to you. This never affects our specs. How we make money.
Key differences
- Updates ASUS Chromebook CM30 Detachable wins
The ASUS Chromebook CM30 Detachable gets Chromebook updates until June 2033, about 2 years longer than the Lenovo IdeaPad Duet 3 Chromebook (June 2031).
- Battery life ASUS Chromebook CM30 Detachable wins
The ASUS Chromebook CM30 Detachable has the bigger battery: 38 Wh against 29 Wh.
- Screen size Depends on you
The Lenovo IdeaPad Duet 3 Chromebook has a slightly bigger screen: 10.95" against 10.5".
Which one should you choose?
Choose the Lenovo IdeaPad Duet 3 Chromebook if…
- You want a little more room on screen: it's 10.95 inches.
- You mostly browse, stream and write: its Snapdragon 7c Gen 2 is built for browsing, email and documents.
- You'll carry it around: it weighs just 0.9458 kg.
Choose the ASUS Chromebook CM30 Detachable if…
- You'll keep it for years: Google updates it until June 2033.
- You're often away from a plug: it has the bigger battery (38 Wh).
- You have fast broadband: its Wi-Fi 6 gets more out of a modern router.
Full spec comparison
Add more laptopsThe ASUS Chromebook CM30 Detachable leads on software and updates; elsewhere the two are closely matched. Highlighted values mark the better spec in each row, and you can hide the rows where they match.
Performance
Both laptops are very close on performance.
Their processors are in the same class: both are built for browsing, email and documents, and both have 8 GB of memory.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Processor | Qualcomm Snapdragon 7c Gen 2 | MediaTek Kompanio 520 |
| Graphics | Qualcomm Adreno GPU | ARM Mali-G52 MC2 |
| Memory (RAM) | 8 GB | 8 GB |
| Memory type | LPDDR4X-2133 | LPDDR4X-4266 |
| Maximum memory | 8 GB | 8 GB |
| Memory upgrades | Soldered (not upgradeable) | Soldered (not upgradeable) |
| Storage | 128 GB | 128 GB |
| Storage type | eMMC | eMMC |
| Storage interface | eMMC 5.1 | eMMC |
| Storage slots | 0 | — |
Screen
On the screen, it comes down to what you need.
The Lenovo IdeaPad Duet 3 Chromebook has a slightly bigger screen: 10.95" against 10.5". The Lenovo IdeaPad Duet 3 Chromebook has a slightly bigger screen, and the ASUS Chromebook CM30 Detachable doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Screen size | 10.95" | 10.5" |
| Resolution | Full HD+ (2000 x 1200) | Full HD+ (1920 x 1200) |
| Aspect ratio | 5:3 | 16:10 |
| Panel | IPS | IPS |
| Refresh rate | 60 Hz | 60 Hz |
| Variable refresh (VRR) | — | No |
| Brightness | 400 nits | 400 nits |
| Colour range | 70.8% NTSC | 118% sRGB |
| HDR | None | None |
| Finish | Glossy | Glossy |
| Touchscreen | Yes | Yes |
| Pen standard | USI 2.0 | USI 2.0 |
Battery and size
The ASUS Chromebook CM30 Detachable is ahead on battery and weight.
It has a bigger battery, and the Lenovo IdeaPad Duet 3 Chromebook doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Battery life (maker claim) | Up to 12 hours | Up to 12 hours |
| Battery capacity | 29 Wh | 38 Wh |
| Charger | 30 W | 45 W |
| Charges via | USB-C | USB-C |
| Fast charging | None | — |
| Weight | 0.946 kg | 0.9 kg |
| Dimensions | 258.04 x 164.55 x 7.90 mm | 259.5 x 169.2 x 8.9-9.0 mm |
| Materials | aluminium and PC-ABS | 30% recycled aluminium case |
| Durability | — | MIL-STD-810H |
| Hinge | detachable | detachable |
| Colour | Storm Grey | Fog Silver |
| Colours available | Storm Grey, Misty Blue | Fog Silver |
Ports and wireless
The ASUS Chromebook CM30 Detachable is ahead on ports and wireless.
It has Wi-Fi 6, and the Lenovo IdeaPad Duet 3 Chromebook doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Ports | 2x USB-C 3.2 Gen 1 (Power Delivery 3.0, DisplayPort 1.4), 1x 5-point pogo connector | 1x USB-C 3.0 (charging, DisplayPort), 1x 3.5 mm combo audio, 1x pogo-pin interface for detachable keyboard |
| Thunderbolt / USB4 | None | None |
| External displays (max) | 2 | — |
| Card reader | None | None |
| Ethernet | None | None |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 6 |
| Wi-Fi card | Qualcomm WCN3991 | — |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.2 |
| Mobile data | None | — |
Features
Both have much the same extras.
From the keyboard to the webcam and login, there is little between them.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Webcam | 5 MP front + 8 MP rear | 5 MP front + 5 MP rear |
| Webcam privacy | None | — |
| Backlit keyboard | No | — |
| Keyboard | detachable UK English folio keyboard, non-backlit | detachable chiclet keyboard, 1.5 mm key travel, pogo-pin connector |
| Number pad | No | No |
| Touchpad | keyboard folio trackpad, 48.8 x 86.8 mm | — |
| Speakers | 2x 1 W stereo | 2x built-in speakers |
| Microphones | dual-array | multi-array microphone |
| Pen | Included | Supported (sold separately) |
| Security | Google Security Chip H1 | Google Titan C |
Software and model
The ASUS Chromebook CM30 Detachable is ahead on software and updates.
It gets updates for longer and is newer, and the Lenovo IdeaPad Duet 3 Chromebook doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Duet 3 Chromebook | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Operating system | ChromeOS | ChromeOS |
| Updates until | June 2031 | June 2033 |
| Model number | 82T60026UK | CM3001DM2A-WS88T-S |
| Released | 2022 | 2023 |