GravaStar Mercury K1 vs WOBKEY Rainy75Battery Life vs Modding
Choose the GravaStar Mercury K1 for superior wireless endurance, or the WOBKEY Rainy75 for deeper customization and a more refined typing experience.
Which one should you get?
Get the
GravaStar Mercury K1
Battery Life
- Exceptionally large 8000mAh battery for extended wireless use.
- Lighter weight (1080g) for easier portability.
- Features a unique, streamlined aluminum alloy exoskeleton design according to the vendor.
- Lacks advanced firmware support like VIA or QMK mentioned in its listing.
- Keycap material is not specified, potentially indicating lower-quality ABS.
- No detailed sound dampening features are listed compared to the competitor.
Get the
WOBKEY Rainy75
Modding
- Extensive firmware support for VIA and QMK for easy reprogramming.
- Comprehensive sound dampening with poron, EPMD, PET foam, and PET insulation layers.
- Includes high-quality Double Shot PBT keycaps.
- Smaller 3500mAh battery requires more frequent charging.
- Substantially heavier at 1800g, reducing portability.
- The vendor listing mentions Bluetooth 5.0, but this specific version is not confirmed in the core metadata.
Select the WOBKEY Rainy75 if your priority is a customizable, acoustically tuned typing experience with robust software support. Opt for the GravaStar Mercury K1 if you need a keyboard that can last weeks on a single charge and is easier to move around. The Rainy75 offers more for the enthusiast, while the Mercury K1 caters to convenience and endurance.
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.
GravaStar Mercury K1
WOBKEY Rainy75
Battery
8,000 mAh
3,500 mAh
Mount style
Gasket Mount
Gasket Mount, PCB Mount, Plate Mount
Weight
1,080 g
1,800 g
QMK
No
Yes
VIA
No
Yes
- GravaStar Mercury K1
- WOBKEY Rainy75
- Performance
- 6670
- Build quality
- 6790
- Productivity
- 6794
- Customizability
- 6494
- Portability
- 9281
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Case material: Aluminum
- Switch options: Linear
What will you mostly use it for?
The WOBKEY Rainy75 is the clear choice for users who value deep customization, whether through firmware (VIA/QMK), sound tuning with multiple foam layers, or keycap compatibility. The GravaStar Mercury K1 wins in scenarios where portability and battery life are paramount, such as frequent travel or a cable-free office setup. For general gaming, both are equally capable.
It's a tie
- Both offer 2.4 GHz wireless and wired connectivity for low-latency options.
- Both feature linear switches suitable for gaming.
- Both have RGB backlighting.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
GravaStar Mercury K1
No owner reviews collected yet.
WOBKEY Rainy75
22 owner reviews
“Amazing build quality and sound. The Keyboard is visually and audibly very appealing. The correct QWERTZ DE layout made the decision to get this keyboard quite easy.”
GravaStar Mercury K1 vs WOBKEY Rainy75 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 22 specs differ
GravaStar Mercury K1
WOBKEY Rainy75
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Display
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
VIA
Mac & Windows
Released
Compare prices
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GravaStar Mercury K1 vs WOBKEY Rainy75: your questions
The GravaStar Mercury K1 has a significantly larger 8000mAh battery, which should provide much longer usage between charges compared to the WOBKEY Rainy75's 3500mAh battery. This makes the K1 better for users who prioritize minimal charging frequency.
The vendor description for the GravaStar Mercury K1 does not mention support for VIA, QMK, or any other reprogramming software. For extensive key remapping and macro programming, the WOBKEY Rainy75, which lists VIA and QMK support, is the confirmed choice.
Only the WOBKEY Rainy75 is listed with Double Shot PBT keycaps. The keycap material for the GravaStar Mercury K1 is not specified in the provided information, so it may come with ABS keycaps which are more prone to shine over time.
The WOBKEY Rainy75 is likely quieter out of the box due to its multiple listed sound dampening layers, including poron, EPMD, and PET foam. The GravaStar K1's vendor description highlights a flexible plate for noise reduction but does not detail specific dampening materials.
Yes, both the GravaStar Mercury K1 and the WOBKEY Rainy75 feature hot-swappable sockets, allowing you to change switches without soldering. The K1's vendor page notes it supports both 3-pin and 5-pin switches.
The WOBKEY Rainy75 is much heavier, weighing 1800g compared to the GravaStar Mercury K1's 1080g. This makes the K1 the more portable option, while the Rainy75's weight may contribute to a more stable, premium feel on the desk.
Yes, the WOBKEY Rainy75's metadata lists support for ANSI, ISO-DE, and ISO layout standards. The GravaStar Mercury K1 is listed as ANSI only, offering fewer physical layout options.
Both keyboards feature RGB backlighting. The WOBKEY Rainy75 specifically mentions south-facing RGB LEDs, which are better for compatibility with Cherry-profile keycaps to prevent interference.
According to the WOBKEY vendor description, the Rainy75 is programmable with VIA over both wired and 2.4 GHz wireless modes. This allows for convenient reprogramming without needing a cable connected.
Both the GravaStar Mercury K1 and the WOBKEY Rainy75 feature aluminum cases. The K1's vendor describes it as an aluminum alloy exoskeleton, while the Rainy75 is listed as a CNC aluminum case.
The WOBKEY Rainy75 lists screw-in stabilizers as an extra feature. The GravaStar Mercury K1's listing does not specify the type of stabilizers it uses.
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