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Module · Casio · digital module

Casio module 3506 manual and CR2032 battery

Casio's operation guide for module 3506: Casio operation guide 3506 (PDF) ↗. Casio module 3506 is a digital module by Casio, used in 5 Casio models. It runs on CR20321 for about 2 years1 and keeps time to ±15 s/month1.

Sources checked · How we source numbers
CR2032: drawing to scaleCR2032: diameter 20 mm, height 3.2 mm.Ø 20−+3.2CR2032
CR2032, the cell the Casio 3506 takesDrawing from data, not a photo · mm

Casio 3506 at a glance

Display
digital1derived
Power
battery1
Battery
CR20321
Battery life
2 years1
Accuracy
±15 s/month1
Light
LED backlight (Auto Light, Super Illuminator, afterglow, selectable illumination duration)1
World time
300 cities, 38 time zones, UTC1

New to the terms? Read quartz vs automatic or watch movement types.

Watches with module 3506

5 models in 1 family share module 3506, so they share its battery, functions and manual[2].

Casio operation guide 3506 (PDF) ↗
The one model on module 3506 we have case sizes for, top view. W = case width, L = Casio case length, L2L = lug to lug, H = thickness. Drawn from the published sizes, not a photo.
  • GBD-2005 modelsGBD-200 · GBD-200LM · GBD-200RD · GBD-200SM · GBD-200UU

Running the Casio 3506

Accuracy and battery figures for the Casio 3506, as Casio prints them.

Accuracy (maker)
±15 s/month1
Battery life
2 years1

Battery for the Casio 3506

  • CR2032[1]Sizes and equivalents of the CR2032 on its page

All Casio 3506 figures

Every figure we hold for the Casio 3506, with its source. Where sources disagree, each value is shown.

Accuracy and care

Accuracy (maker)
±15 s/month1

Power

Power source
battery1
Battery
CR20321
Battery life
2 years1

Module functions

Display
digital1derived
Light
LED backlight (Auto Light, Super Illuminator, afterglow, selectable illumination duration)1
Alarms
count 4 · snooze1
Countdown timer
measuring unit 1 second · max setting minutes 60 · auto repeat1
Stopwatch
measuring unit 1 second · capacity 99:59'59 (100 hours)1
World time
300 cities, 38 time zones, UTC1
Bluetooth
Yes1

Not published yet

  • Hands and functions: not published
  • Radio time signal: not published
  • Operating temperature: not published by Casio
  • Power saving: not published

Casio 3506 questions

Where is the manual for Casio module 3506?

Casio publishes the operation guide for module 3506 as a PDF: Casio operation guide 3506. The number 3506 is stamped on the case back of every watch built on it.

What battery does the Casio module 3506 take?

The Casio module 3506 takes CR2032; Casio gives 2 years of life.

Source [1]

Which watches use Casio module 3506?

5 Casio models in Casio’s manual search use module 3506, in the GBD-200 family.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Casio Computer Co., Ltd. — Watch Operation Guide 3506 (qw3506_EN.pdf) · pdf · read
  2. 2Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read