Ajazz AK820 Max vs GravaStar Mercury K1Screen vs Battery & Build
Choose the Ajazz AK820 Max for its screen and Hall effect switches at a lower cost, or the GravaStar Mercury K1 for its premium aluminum build and double the battery life.
Which one should you get?
Get the
Ajazz AK820 Max
Screen
- Includes a TFT screen for displaying system information or custom graphics.
- Features Hall effect magnetic switches for potential customization and consistency.
- Comprehensive sound dampening with silicone, cotton, and IXPE foam layers.
- Case is constructed from ABS plastic, which may feel less premium than metal.
- Smaller 4000mAh battery capacity.
- Some user reviews cited wireless latency issues in gaming scenarios.
Get the
GravaStar Mercury K1
Battery & Build
- Constructed with an aluminum alloy case for a premium, durable feel.
- Massive 8000mAh battery capacity for extended wireless use.
- Features a POM plate, which can provide a distinctive sound signature.
- Significantly more expensive than the Ajazz model.
- Heavier at 1080g and slightly larger in all dimensions.
- Lacks a screen and control knob.
Your budget and priority features dictate the choice here. The Ajazz AK820 Max delivers exceptional value, packing a screen, knob, Hall effect switches, and advanced sound foam into a lighter, more affordable package. The GravaStar Mercury K1 is an investment in premium materials, offering an aluminum chassis and a battery that doubles the competition's capacity, but you pay more and forgo some interactive features.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Ajazz AK820 Max
GravaStar Mercury K1
Hall effect (magnetic)
Yes
No
Battery
4,000 mAh
8,000 mAh
Case material
ABS, PBT
Aluminum
Switch options
Linear, Magnetic
Linear
Knob
Yes
No
- Ajazz AK820 Max
- GravaStar Mercury K1
- Performance
- 6066
- Build quality
- 5567
- Productivity
- 8567
- Customizability
- 7564
- Portability
- 8192
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Mount style: Gasket Mount
What will you mostly use it for?
The Ajazz AK820 Max wins in more categories, particularly for gaming, travel, modding, and content creation, thanks to its Hall effect switches, screen, knob, and detailed sound dampening. The GravaStar Mercury K1 is the clear choice for office use where its massive battery and aluminum build are major assets. For programming, it's a tie, as both layouts are identical and hot-swappable, leaving the choice to preference for a screen versus a POM plate.
Pick the Ajazz AK820 Max
- Includes Hall effect magnetic switches, which are known for adjustable actuation and consistency.
- Features N-key rollover for simultaneous key presses.
- South-facing RGB lighting is compatible with more keycap profiles.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Ajazz AK820 Max
16 owner reviews
“This keyboard is designed to work with windoz and Mac. But I can't find Apple replacement keycaps anywhere. This is the only reason it gets 4 stars instead of 5.”
“Launching a game makes the board thinks it switch to Mac mode, swapping Alt and Win key. This is random and will usually happen when launching a game. The only fix I know is to unplug and replug the keyboard over and over again until it thinks its in Win mode…”
GravaStar Mercury K1
No owner reviews collected yet.
Ajazz AK820 Max vs GravaStar Mercury K1 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
10 of 21 specs differ
Ajazz AK820 Max
GravaStar Mercury K1
Switch options
Hall effect (magnetic)
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Lowest price across stores, Amazon excluded.
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Ajazz AK820 Max vs GravaStar Mercury K1: your questions
The GravaStar Mercury K1 has a significantly larger 8000mAh battery compared to the Ajazz AK820 Max's 4000mAh battery. This suggests the GravaStar will last much longer on a single charge during wireless use.
Yes, the Ajazz AK820 Max supports Hall effect magnetic switches. The manufacturer's specifications list this as a feature, and the product is described as hot-swappable, allowing for their installation.
Yes. The product metadata and vendor description confirm the GravaStar Mercury K1's case is made of aluminum alloy, which contributes to its heavier weight of 1080g and premium feel.
Both have gasket mounts for a softer feel, but they use different materials for sound. The Ajazz uses an FR4 plate and includes multiple foam layers (silicone, cotton, IXPE) for dampening. The GravaStar uses a POM plate, which is known for a deeper, more muted sound profile.
Yes, both the Ajazz AK820 Max and the GravaStar Mercury K1 feature hot-swappable PCBs. This allows you to easily change between compatible mechanical switches without soldering.
According to the vendor page, the Ajazz AK820 Max includes the keyboard itself, a user manual, a Type-C cable, and a keycap puller.
No. Based on the provided specifications and description, the GravaStar Mercury K1 does not include a control knob or any form of screen. The Ajazz AK820 Max includes both a knob and a TFT screen.
One user review on the vendor page reported noticeable input lag in wireless mode during gaming, which was resolved when switching to wired mode. The vendor's response suggested trying the 2.4GHz mode for better stability over Bluetooth.
The Ajazz AK820 Max is more portable. It is lighter (850g vs 1080g) and has slightly smaller dimensions (333 x 145 mm vs 343 x 156 mm), making it easier to carry in a bag.
Yes. Both the Ajazz AK820 Max and GravaStar Mercury K1 list Mac and Windows support in their extra features. The Ajazz vendor page explicitly lists support for Windows, Mac, and Android.
Both have RGB lighting. The Ajazz AK820 Max features south-facing RGB LEDs, which prevent interference with some keycap profiles. The GravaStar Mercury K1 vendor description highlights a unique 'three-sided streamer' lighting effect.
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