The W-800H’s crystal is recessed, making it prone to smudges and glare. The fix? Fill the case with (low viscosity, like 5cSt or 10cSt). This eliminates internal reflections, makes the LCD “pop” as if painted on the glass, and increases water resistance dramatically (theoretically past 200m). The downside? The buttons become stiff, and it’s messy if you fail.
: This is the most popular mod. By opening the case and using a soldering iron or wick to disconnect a specific jumper pad (usually labeled "J1") on the back of the PCB, you can unlock a hidden countdown timer and up to 5 alarms. Dual Time/Alarm Sound Tweak
While the Casio W-800H module is a reliable and popular choice, there are some challenges and limitations to consider: casio w-800h mod
: Put the module back in the case and scroll through the modes. You should now see a TR (Timer) mode following the stopwatch. 2. Visual Overhaul: Negative Display & Color Filters
The watch's appeal is built on a solid foundation. It boasts a ten-year battery life and 100-meter water resistance straight out of the box, making it a durable and reliable option for daily wear, travel, and even snorkeling. The large, legible LCD display is a welcome feature, and the LED backlight, distributed by a light guide panel, is notably effective in low-light conditions. But the most thrilling aspect is its capacity for modification. The following guide will explore the most popular, creative, and technically interesting ways to mod your Casio W-800H, from unlocking hidden software features to performing dramatic visual transformations. The W-800H’s crystal is recessed, making it prone
The W-800H case features printed text like "10 YEAR BATTERY" and "WR 100M".
Maintaining water resistance requires the application of high-grade silicone grease to the O-ring and careful alignment of the case back. : This is the most popular mod
Thread the NATO strap through the steel lugs. Press the buttons to set the main time to your local zone, and the Dual Time to UTC. Rotate the bezel so the 24-hour mark aligns with UTC.
Are you interested in sourcing for a specific look?
One of the most popular visual mods is inverting the screen to create a sleek "negative" display, where the digits appear light against a dark background. This mod involves carefully opening the watch, removing the LCD panel, and peeling off its top polarizing film. Once the adhesive is cleaned off, you rotate the film 90 degrees and reapply it, which instantly reverses the display. However, it's worth noting that this mod can sometimes reduce visibility in low-light conditions, as the backlight can appear weaker and more uneven. Another variation involves replacing the reflective backing of the LCD to create a "transparent" screen, an advanced modification that provides a unique look.
Optional: A small scraper or needle if not using a soldering iron Step-by-Step Timer Mod Procedure