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Casio
Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A

Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A

Best price now

$162.38at Christine JewellersChecked Nov 9

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Price facts

  • Last seen at $162.38 at Christine Jewellers on Nov 9.

Our take on the Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A

The GA-B2100 is Casio's slimmed-down G-Shock with analog hands and a digital window, built on the Carbon Core Guard case that keeps it lighter and flatter than the classic square G-Shocks. It adds Tough Solar charging and Bluetooth phone linking for automatic time correction, plus 200 m water resistance and world time. It suits people who want a tough everyday watch with analog looks and no battery swaps. Against the original GA-2100 it trades a little thickness for solar power and Bluetooth, and it undercuts metal-case rivals on features per dollar.

Best forEveryday wear with analog styleOutdoor and water activityBuyers who want solar charging and no battery changesTravelers who want automatic time correction
Pros
  • Tough Solar charging removes routine battery swaps
  • Bluetooth linking keeps time accurate across time zones
  • Carbon Core Guard case is light at 52 g and slim at 11.9 mm
  • 200 m water resistance and shock resistance
  • Double LED illumination and Neobrite hands for low light
  • Analog-digital layout is easy to read at a glance
Cons
  • Mineral glass scratches more easily than sapphire
  • Bluetooth and app pairing add setup steps
  • Small digital subdial is hard to read for some
  • Resin band is basic and can feel stiff at first
  • No GPS; time sync depends on the phone link

Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A prices at every store

  • Christine JewellersNew

    In stockShips from Canada · priced in CAD (CA$229.00) · duties may applyReturn policy

    $162.38Checked Nov 9
    Visit Christine Jewellers

What reviewers say

Owners treat the GA-B2100 as a durable, good-looking daily watch and a clear step up from the non-solar GA-2100. Most praise the light case, solar charging and Bluetooth accuracy; complaints center on the small digital display and the mineral glass.

What people mention
  • BuildPraisedOwners say the Carbon Core Guard case shrugs off knocks and feels light for its size.
  • Solar chargingPraisedReviewers like that Tough Solar keeps it running without opening the case for a battery.
  • Bluetooth syncMixedTime correction via the app is accurate, but some find pairing and reconnecting fiddly.
  • DisplayCriticisedThe small digital window is called hard to read, especially in low light.
  • GlassCriticisedMineral glass is reported to scratch more easily than sapphire on pricier rivals.
  • StrapMixedThe resin band is durable but some owners find it stiff until broken in.

About the Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A

The G-Shock GA-B2100-1A is a compact analog-digital watch with a shock-resistant Carbon Core Guard structure. It has a carbon and resin case and bezel, a resin band and mineral glass. It is water resistant to 200 meters.

It runs on Tough Solar power and connects to a smartphone over Bluetooth®, which sets the time automatically. The CASIO WATCHES app also provides easy watch setting, a world time city selection of approximately 300 cities, a reminder and a phone finder.

Two LED lights illuminate the face and the digital display in white. The hands can shift out of the way for an unobstructed view of the digital display. The watch also has world time, a stopwatch, a countdown timer, five daily alarms and a full auto-calendar.

Case size
48.5 × 45.4 × 11.9 mm (L×W×H)
Weight
52 g
Case and bezel
Carbon / Resin
Band
Resin
Glass
Mineral glass
Construction
Shock resistant, Carbon Core Guard structure
Water resistance
200 meters
Power
Tough Solar (solar powered)
Battery life
Approx. 7 months on a charged rechargeable battery with normal use and no light exposure; approx. 18 months stored in total darkness with power save on after a full charge
Accuracy
±15 seconds per month (with no mobile link function)
Connectivity
Bluetooth®; auto time adjustment
App
CASIO WATCHES: auto time adjustment, easy watch setting, approx. 300 world time cities, time & place, reminder, phone finder

Questions and answers

Is the GA-B2100 worth it over the original GA-2100?
Yes if you want solar charging and Bluetooth time correction. The case is slightly thicker, but you stop worrying about battery changes and the time stays accurate.
Does it need a phone to keep time?
No. It runs as a normal solar quartz watch and keeps time on its own. Bluetooth only adds automatic correction and easy settings through the app.
How does it compare with the G-Shock square models?
It is slimmer and lighter than most squares and has analog hands. Squares offer a bigger digital display and more buttons-first operation.
Is it good for swimming and diving?
It has 200 m water resistance, which covers swimming and snorkeling. It is not a dive computer and has no depth gauge.
What is in the box?
The watch, a resin band, and the standard documentation. Charging is by light, so no cable is needed.
How does the Bluetooth link work?
You pair it once with the Casio Watches app, and it adjusts time automatically and lets you set alarms and world time from the phone.
Where is the Casio G-Shock Analog-Digital 2100 Series GA-B2100-1A cheapest?
At Christine Jewellers, for $162.38, as of our latest check.

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World time
38 time zones (38 cities + UTC), city code and city name display, daylight saving on/off, auto summer time switching, home city/world time city swapping
Stopwatch
1/100-second; 00'00''00 to 59'59''99 for the first 60 minutes, then 1:00'00 to 23:59'59 in 1-second units; elapsed time and lap/split modes
Timer
Countdown timer, 1-second unit, 60-minute range, start time settable from 1 second to 60 minutes
Alarms
5 daily alarms; hourly time signal
Light
Double LED (white): face light and digital display backlight, Super Illuminator, 1.5 or 3 seconds selectable, afterglow; Neobrite
Calendar
Full auto-calendar to year 2099
Display
Analog: hour and minute hands (moves every 20 seconds), 1 dial for battery level and mode; Digital: hour, minute, second, pm, month, date, day
Other features
Hand shift, 12/24-hour format, date/month display swapping, day of week in six languages, button tone on/off, power saving, battery level indicator
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