G-Shock GAB2100-2A Solar CasiOak

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Upgrade the retro look you love with the octagonal GA-2100 line, which inherits the design concept of the very first G-SHOCK, but now with Smartphone Link and Tough Solar power.

Smartphone Link Feature:

  • Mobile link (Wireless linking using Bluetooth®)
  • Auto time adjustment
  • Easy Watch Setting
  • Approximately 300 world time cities
  • Time & place
  • Reminder
  • Phone Finder

World Time:

• World time
• 38 time zones (38 cities + coordinated universal time)
• City code display
• City name display
• Daylight saving on/off
• Auto summer time (DST) switching
• Home city/World time city swapping


• Countdown timer
• Measuring unit: 1 second
• Countdown range: 60 minutes
• Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)


Double LED light
• LED light for the face
    · Super illuminator
    · Selectable illumination duration (1.5 seconds or 3 seconds)
    · Afterglow)
• LED backlight for the digital display
    · Super illuminator
    · Selectable illumination duration (1.5 seconds or 3 seconds)
    · Afterglow)


  • Full auto-calendar (to year 2099)

Energy Saving Feature:

  • Power Saving (Display goes blank to save power when the watch is left in the dark)


• 1/100-second stopwatch
• Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes)
• Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes)
• Measuring modes: Elapsed time, lap/split time

Alarm/Hourly Time Signal:

  • 5 daily alarms
  • Hourly Time Signal

Mute Feature:

  • Button operation tone on/off

Battery Display/Alert

  • Battery Level Indicator


• Shock Resistant
• Carbon Core Guard structure

Power Supply And Battery Life:

Tough Solar (Solar powered)

Surface Treatment:

Other: Neobrite

Light Color:

  • White


  • ±15 seconds per month (with no mobile link function)

Run Time:

Approx. battery operating time:
• 7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

Other Features:

• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• 12/24-hour format
• Date/month display swapping
• Day display (days of the week selectable in six languages)
• Regular timekeeping:
∙ Analogue: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
∙ Digital: Hour, minute, second, pm, month, date, day

Band Type:

  • Resin Band

Case And Bezel Material:

  • Carbon
  • Resin


48.5 × 45.4 × 11.9 mm



Compatible Band Size:

145 to 215 mm


  • Mineral Glass


52 g

Water Resistance:

  • 200 M

We try to stock as much as possible in our holdings at all times however due to fluctuations in sales trends and availability through Casio Australia we sometimes will not have every item in stock.

We dispatch all orders that are in stock the next business day or same business day when your order placed before 10am (Queensland time) providing we have the watch in stock.

We want you to be happy with your watch and therefore we will gladly refund any item for you within 30 days of dispatch. The item must be returned to us in new and unworn condition and include all components including the watch, tags, box and instruction manual. You will need to include your warranty card or receipt with your watch showing the date of purchase. Email us and we will reply with the appropriate information for your claim.

Casio Watch Repairs

G Life Watches is able to have your watch repaired for you.

Casio G-Shock Watch & Baby G Repair 

Most common repairs required are just batteries and pressure testing or band replacements. Whatever is required we can arrange to have it repaired and returned to you as quickly as we can. Please click here to email us with your contact details, model number off the back of the watch (it will be letter(s) followed by numbers i.e. DW6900 or GA110 or similar) and colour (if applicable i.e. band colour, case colour etc) and we will be more than happy to follow up on the availability, time frame and cost estimate for your repair or part. Most repairs take around 3 weeks to complete and return to you. Parts are generally 1 week but can be up to 4 weeks.


G Shock Replacement Prices 

The estimate of charges (note though this is a guide for most models, some of the more intricate models can be higher than the estimates here):

  • Battery, seals and pressure test - $70 (Baby G) / $80 (G Shock) for most models
  • Mudmaster / Premium series - battery, seals and pressure test - $95
  • Replacement Bands (rubber) - $50 to $70 for most models
  • Replacement Bands (metal) - $80 - $110 for most models
  • Pins for bands - $7 for most models
  • Replacement of watch case - $80 - $150 for most models
  • Complete overhaul with a new module/movement in the watch - Contact us with your model number and colour for a tailored quote.

What to do with Broken Watches? 

G Shock Battery Replacement

G Shock battery life ranges from two to six years, depending on how often you use the alarm or the backlight. Frequent use of either feature drains the battery pretty fast hence, the need for replacement. The life of the replacement battery, on the other hand, depends on how long it has been sitting on the shelf. Its shelf life is ten years in room temperature after which it goes through gradual degradation.

G Shock Strap Replacement 

G Shock watches are known to last a lifetime, but the bands wear out after prolonged use. To replace them, place the watch facing downwards on a soft cloth, unhook the spring bars located at the base of each strap. Some models have the bars covered while others are exposed. Use a spring-bar removal tool to unhook and pull the band away from the watch. Repeat the process to remove the other spring bar. Replace them with the rod slots of the new band and use the spring-bar tool to fasten the bands. The procedure applies when replacing rubber straps. Metallic bands require a little tact hence, the need to engage a professional.