CASIO
Casio G-Shock GA-B2100-1A1 Solar Carbon Watch 200m 45.40mm
Solar-powered analog-digital sports watch with a carbon case, 200 m water resistance and mobile link
- StyleSports
- MaterialCarbon
- MovementSolar
- ShapeRound
- Dial ColorBlack
- Dial MarkersIndex
- Solar charging keeps the watch running without battery changes
- Carbon case and resin strap deliver lightweight durability
- 200 m water resistance suits swimming and diving
- Bluetooth link syncs time and settings with a smartphone
- Caliber 5689 drives analog and digital displays with date
Carbon solar sport watch
The Casio G-Shock GA-B2100-1A1 combines a carbon case with a resin strap for a lightweight sports watch built to handle daily knocks. Solar charging keeps the movement running without battery changes, while 200 m water resistance covers swimming and surface water sports. Mobile link adds smartphone connectivity for time sync and function control. The 45.40 mm case diameter suits wrists that prefer a substantial presence.
Thermals noise and power
Solar power eliminates the need for periodic battery replacements, so the watch draws energy from ambient light during normal wear. The analog-digital display and module 5689 operate without audible noise or perceptible heat on the wrist. Fixed bezel and mineral crystal protect the internals from impacts that could affect timekeeping. Power reserve is maintained automatically as long as the dial receives regular light exposure.
Build quality and daily use
Carbon case construction reduces weight while retaining the shock resistance the G-Shock line is known for. Resin strap with buckle clasp secures the watch during vigorous activity and resists sweat and moisture. Mineral crystal guards the black dial and index markers against scratches from everyday contact. Mobile link lets you adjust world time, alarms and day-date settings from a paired phone instead of pressing multiple buttons on the case.
Highlights
- Solar charging keeps the watch running without battery changes
- Carbon case and resin strap deliver lightweight durability
- 200 m water resistance suits swimming and diving
- Bluetooth link syncs time and settings with a smartphone
- Caliber 5689 drives analog and digital displays with date
Specifications
| Brand | CASIO |
|---|---|
| Style | Sports |
| Material | Carbon |
| Movement | Solar |
| Shape | Round |
| Dial Color | Black |
| Dial Markers | Index |
| Display | Analog and Digital |
| Date | Date |
| Band Material | Resin |
| Fastener | Buckle Clasp |
| Gender | Male |
| Condition | New |
| Bezel | Fixed Bezel |
| Case Material | Carbon |
| Case Thickness | 45.40 mm |
| Crystal | Mineral Crystal |
| Water-Resistant | 200m |
| Special Features | Mineral Crystal,Buckle Clasp,Day and Date Display |
Questions about this item
How is the watch paired with the Casio G-Shock app and what step is often missed?
Enable Bluetooth on the phone, open the app, hold the watch's lower left button until the connection icon flashes, then confirm the pairing code on both screens; skipping the code confirmation leaves the link inactive.
What part will need replacement first and roughly when?
The solar-powered rechargeable cell typically lasts 7–10 years before its capacity drops enough to require a watchmaker swap.
What limit appears first during continuous heavy use of the backlight and phone alerts?
The power reserve drains faster than the solar panel can replenish it, so the watch will enter power-save mode and disable the backlight until recharged.
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