Hydro modding involves filling the entire watch case with .
or a copper braid (optional, to help remove excess solder). Tweezers for handling small components. Step-by-Step Instructions
By opening a specific jumper connection, you instantly restore the factory countdown timer mode. Required Tools
The W-800H uses a module shared with more expensive Casio models. Casio disables certain functions via hardware to justify different price points. casio w-800h mod
is often swapped to enhance comfort and durability. The stock resin strap, while functional, is frequently replaced with nylon NATO straps using third-party lug adapters. This change not only prevents the watch from falling off if a spring bar fails but also allows for personal expression through different colors and patterns. Some users go as far as using sandpaper or polishing compounds to remove the "10 YEAR BATTERY" and "WR 100M" text from the bezel, resulting in a cleaner, minimalist aesthetic. Casio W-800H
Some users use specific solvents to remove the printed text from the resin bezel, creating a "stealth" appearance. This requires care to ensure the solvent does not damage the resin finish. Standard Configuration Post-Modification Potential Countdown Timer Not Active Functional (Requires PCB modification) Stopwatch Water Resistance 100m Factory Rated Variable (Dependent on seal integrity) Display Type Standard LCD Improved contrast (If hydro-modded)
You don't need a professional watchmaking bench to start modding your W-800H. A modest but well-chosen set of tools is the best starting investment. Hydro modding involves filling the entire watch case with
The allure of the Casio W-800H mod is undeniable. For a minimal investment of money and a few hours of focused work, you can own a watch with thousands of dollars worth of personality and a feature set that's perfectly tailored to you. The journey of modifying a watch is an education in itself, offering a deep, tactile understanding of how a digital watch works. The community is large and helpful, with countless forums, videos, and guides dedicated to every conceivable project.
By spending just a little time modifying your Casio W-800H, you turn a basic $20 watch into a custom, feature-packed daily tool that stands out from the crowd. If you want to customize your watch, let me know:
Once you start, you’ll never look at a stock W-800H the same way again. is often swapped to enhance comfort and durability
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: On the right side of the board (near the buttons), you will see a column of solder pads. Look for a closed solder jumper (a small blob of solder connecting two pads).
Use your tweezers to gently lift the white plastic module out of the resin watch case.