Use our Pro Trek battery finder to get the exact cell for your watch. Type your model (for example PRW-3000, PRG-270, PRG-600) into the search, or paste the 3–4 digit module from the case back. Filter if needed, then read the “Battery” column and follow your model’s link if you want to buy the correct part. The table is the single source of truth—always match the exact model/module before ordering.
Casio ProTrek Battery Finder
Type your ProTrek model (e.g., PRW-3000, PRG300, PRX 7000). The search ignores spaces and hyphens. Filter by battery if needed.
| Model | Battery | Notes |
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Casio Pro Trek battery guide
Planning a casio pro trek battery replacement (aka casio protrek battery replacement)? Start by confirming the exact model and module, then check the casio pro trek battery type in the finder. Many modern Pro Trek watches use Tough Solar with a rechargeable accumulator (often CTL1616/CTL1616F). Older or select references may use primary CR coin cells. The finder tells you exactly which one your watch needs.
How long do casio batteries last? On Tough Solar Pro Trek models, the rechargeable cell can last 7–10+ years with regular light exposure. Non-solar quartz models using CR cells typically run 2–5 years, depending on alarms, backlight use, and temperature.
DIY vs. service: You can do a protrek battery replacement yourself if you’re comfortable with tiny screws and gaskets. If water resistance matters (hiking, swimming), consider professional reseal and pressure testing. For casio protrek tough solar battery replacement, remember you’re swapping a rechargeable accumulator, not a standard disposable coin cell.

Quick steps at your own risk:
- Verify model/module in the finder and note the battery.
- Work on a clean surface with small screwdrivers/tweezers; take a reference photo.
- Open the back carefully, lift insulators as shown in your module’s manual, and replace the cell indicated by the table. Avoid touching contacts.
- Inspect the gasket; replace if flattened or cracked.
- Reassemble, perform the module reset/AC short if required, and give solar models a full charge under bright light.
Common searches and examples: casio prg 80 battery replacement, casio pro trek prg 40 battery, casio protrek prg 270 battery replacement, casio protrek prw 2500 battery replacement, casio protrek prg 40 battery change, casio protrek prg 280 battery replacement, casio protrek prg 50 battery. The process is the same: confirm exact model/module → match the battery in the finder → replace carefully → reseal and, for solar, charge fully.
Tips to maximize casio pro trek battery life:
• For Tough Solar, give the watch regular light; avoid long dark storage.
• Limit unnecessary alarms/auto-light and long backlight use, especially in cold.
• After replacement, charge to “HI” before heavy use.
Bottom line: Use the table to identify the correct casio pro trek battery type quickly, handle the swap carefully, and consider professional resealing if you rely on full water resistance.