34 facts in comparison
Keychron B11 Pro vs Keychron B40
This comparison puts the Keychron B11 Pro and Keychron B40 side by side — two keyboards measured against the same 34-spec sheet, with every meaningful gap scored and explained. On our weighted VS Score the Keychron B40 finishes ahead, 100 to 87 — a decisive result.
The single biggest measurable gap is battery life: 138 h vs 330 h. None of our retail partners currently lists the Keychron B40, so availability may be limited and price cannot factor into this comparison. A transparency note before you dive in: the spec sheets are Keychron B11 Pro 71% and Keychron B40 65% complete. Anything unverified shows as Unknown and is left out of the scores — we never estimate a missing value.
Where the Keychron B11 Pro beats the Keychron B40
No standout advantages.
Where the Keychron B40 beats the Keychron B11 Pro
- Much longer battery life ?330 h vs 138 h
- A much bigger battery ?800 mAh vs 250 mAh
- Has rotary knob ?
Key real-world differences
The spec sheet pulls in both directions. These are the gaps big enough to shape the decision — with the actual figures, and what each one means in real-world use.
- Battery lifeConnectivity138 h vs 330 h — 2.4× more for the Keychron B40
Battery life for wireless models.
- Rotary knobFeaturesNo vs Yes — only the Keychron B40 has it
A control knob for volume or custom actions.
- Battery capacityConnectivity250 mAh vs 800 mAh — 3.2× more for the Keychron B40
The rated capacity of the internal battery.
Capacity is a proxy, not a promise — display, chip efficiency and software decide how long a charge really lasts.
Which one should you buy?
There is no single answer — it depends on what you will actually use it for. Match your priority to the pick below.
- Best for connectivity Keychron B40 takes the category 100 to 62 — driven by battery life (138 h vs 330 h).
- Best for features Keychron B40 takes the category 100 to 82 — driven by rotary knob (No vs Yes).
- The safe all-rounder Keychron B40 wins more of the categories that carry real weight, topping the overall VS Score at 100.
Where each one falls short
Keychron B11 Pro
- Battery life: 138 h vs 330 h
- Rotary knob: No vs Yes
- Battery capacity: 250 mAh vs 800 mAh
- 10 specs are unreported (shown as Unknown) and excluded from its scores.
Keychron B40
- No major spec weaknesses in this matchup — the gaps that exist are small.
- 12 specs are unreported (shown as Unknown) and excluded from its scores.
What matters to you?
Drag the sliders to weight each category and re-rank the products to suit your priorities.
Score breakdown
Switches & typing
Performance
Layout & size
Connectivity
Build & sound
Features
Specs last verified September 1, 2026Keychron B11 Pro: 24 of 34 specs verified (71%)Keychron B40: 22 of 34 specs verified (65%)Unverified specs show as Unknown — never estimated, never scored
Where to buy
No price is available to track yet.
Prices and availability may change. Check the retailer before buying. We may earn a commission on purchases.
What reviewers say
The bottom line
The Keychron B40 is the clear winner, scoring 100 to 87 on our VS Score. It leads on Connectivity and Features.
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