Lenovo IdeaPad Chromebook Duet vs ASUS Chromebook CM30 Detachable
The Lenovo IdeaPad Chromebook Duet is the better laptop on paper: it is faster and gets updates for longer. Pick the ASUS Chromebook CM30 Detachable only if it matters to you that it has a bigger battery.
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Key differences
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Performance
Lenovo IdeaPad Chromebook Duet wins
The Lenovo IdeaPad Chromebook Duet's MediaTek Kompanio 838 is quicker: it copes well with everyday tasks, while the ASUS Chromebook CM30 Detachable's MediaTek Kompanio 520 is built for browsing and documents.
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Gaming
Evenly matched
Neither is made for modern games.
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Display
Evenly matched
Closely matched screens: 10.95" Full HD 400 nits against 10.5" Full HD 400 nits.
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Battery life
Evenly matched
Similar battery life: up to 12 hours against up to 12 hours.
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Connectivity
Evenly matched
Much the same ports and wireless on both.
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Portability
ASUS Chromebook CM30 Detachable wins
The ASUS Chromebook CM30 Detachable is easier to carry at 0.9 kg, against 1.1 kg.
Other differences
- Updates Lenovo IdeaPad Chromebook Duet wins
The Lenovo IdeaPad Chromebook Duet gets Chromebook updates until June 2034, about 1 year longer than the ASUS Chromebook CM30 Detachable (June 2033).
Which one should you choose?
Choose the Lenovo IdeaPad Chromebook Duet if…
- You want a snappier laptop for everyday work: its MediaTek Kompanio 838 is the faster processor.
- You'll keep it for years: Google updates it until June 2034.
- You want a little more room on screen: it's 10.95 inches.
Choose the ASUS Chromebook CM30 Detachable if…
- You're often away from a plug: it has the bigger battery (38 Wh).
- You carry your laptop a lot: it's the lighter of the two at 0.9 kg.
Full spec comparison
The Lenovo IdeaPad Chromebook Duet leads on performance and software and updates, while the ASUS Chromebook CM30 Detachable leads on battery and weight.
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 Chromebook Duet is ahead on performance.
It is faster, and the ASUS Chromebook CM30 Detachable doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Processor | MediaTek Kompanio 838 | MediaTek Kompanio 520 |
| Graphics | Arm Mali-G57 MC3 | ARM Mali-G52 MC2 |
| AI engine (NPU) | 4 TOPS | — |
| Memory (RAM) | 8 GB | 8 GB |
| Memory type | LPDDR4X-3733 | 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 Chromebook Duet has a slightly bigger screen: 10.95" against 10.5". The Lenovo IdeaPad Chromebook Duet has a slightly bigger screen, and the ASUS Chromebook CM30 Detachable doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Screen size | 10.95" | 10.5" |
| Resolution | Full HD+ (1920 x 1200) | Full HD+ (1920 x 1200) |
| Aspect ratio | 16:10 | 16:10 |
| Panel | IPS | IPS |
| Refresh rate | 60 Hz | 60 Hz |
| Variable refresh (VRR) | No | No |
| Brightness | 400 nits | 400 nits |
| Colour range | 72% NTSC | 118% sRGB |
| HDR | None | None |
| Finish | Glossy | Glossy |
| Touchscreen | Yes | Yes |
| Pen standard | USI (Lenovo USI Pen 2) | USI 2.0 |
Battery and size
The ASUS Chromebook CM30 Detachable is ahead on battery and weight.
It has a bigger battery and is a little lighter, and the Lenovo IdeaPad Chromebook Duet doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Battery life (maker claim) | Up to 12 hours | Up to 12 hours |
| Battery capacity | 29 Wh | 38 Wh |
| Charger | 45 W | 45 W |
| Charges via | USB-C | USB-C |
| Weight | 1.101 kg | 0.9 kg |
| Dimensions | 255.37 x 166.92 x 7.6 mm | 259.5 x 169.2 x 8.9-9.0 mm |
| Materials | Aluminium (tablet), PU (Folio Stand), PU (Folio Keyboard) | 30% recycled aluminium case |
| Durability | MIL-STD-810H | MIL-STD-810H |
| Hinge | Detachable tablet with folio stand and pogo-pin folio keyboard | detachable |
| Colour | Luna Grey | Fog Silver |
| Colours available | Luna Grey | Fog Silver |
Ports and wireless
Both have much the same ports and wireless.
You can plug in the same things on either.
| Spec | Lenovo IdeaPad Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Ports | 2x USB-C (USB 5Gbps, both charge via USB PD, DisplayPort 1.4), 1x 3.5 mm headphone/microphone combo, 1x Pogo pin connector (3-point, folio keyboard) | 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) | 1 | — |
| Card reader | None | None |
| Ethernet | None | None |
| Wi-Fi | Wi-Fi 6 | Wi-Fi 6 |
| Wi-Fi card | MediaTek Wi-Fi 6 MT7921 | — |
| Bluetooth | Bluetooth 5.3 | 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 Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Webcam | 5 MP front (fixed focus); 8 MP rear (autofocus) | 5 MP front + 5 MP rear |
| Webcam privacy | physical privacy shutter (e-shutter switch) | — |
| Backlit keyboard | No | — |
| Keyboard | detachable Folio Keyboard (pogo pin), non-backlit | detachable chiclet keyboard, 1.5 mm key travel, pogo-pin connector |
| Number pad | No | No |
| Touchpad | Mylar one-piece multi-touch trackpad on the folio keyboard, 48.8 x 86.8 mm | — |
| Speakers | 2x 1 W stereo, Waves MaxxAudio, Smart Amplifier | 2x built-in speakers |
| Microphones | dual-microphone array | multi-array microphone |
| Pen | Supported (sold separately) | Supported (sold separately) |
| Security | Google Security Chip H1, camera privacy shutter | Google Titan C |
Software and model
The Lenovo IdeaPad Chromebook Duet is ahead on software and updates.
It gets updates for longer and is newer, and the ASUS Chromebook CM30 Detachable doesn't beat it on anything here.
| Spec | Lenovo IdeaPad Chromebook Duet | ASUS Chromebook CM30 Detachable |
|---|---|---|
| Operating system | ChromeOS | ChromeOS |
| Updates until | June 2034 | June 2033 |
| Model number | 83HH000BUK | CM3001DM2A-WS88T-S |
| Released | 2024 | 2023 |