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Module · Casio · analog-digital module

Casio module 5641 manual and CR2025 battery

Casio's operation guide for module 5641: Casio operation guide 5641 (PDF) ↗. Casio module 5641 is an analog-digital module by Casio, used in 5 Casio models. It runs on CR20251 for about 2 years1 and keeps time to ±15 s/month1.

Sources checked · How we source numbers
CR2025: drawing to scaleCR2025: diameter 20 mm, height 2.5 mm.Ø 20−+2.5CR2025
CR2025, the cell the Casio 5641 takesDrawing from data, not a photo · mm

Casio 5641 at a glance

Display
analog-digital1derived
Power
battery1
Battery
CR20251
Battery life
2 years1
Accuracy
±15 s/month1
World time
Yes1

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

Watches with module 5641

5 models in 1 family share module 5641, so they share its battery, functions and manual[2].

Casio operation guide 5641 (PDF) ↗
The one model on module 5641 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.
  • GBA-9005 modelsGBA-900 · GBA-900CB · GBA-900RD · GBA-900SM · GBA-900UU

Running the Casio 5641

Accuracy and battery figures for the Casio 5641, as Casio prints them.

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

Battery for the Casio 5641

  • CR2025[1]Sizes and equivalents of the CR2025 on its page

All Casio 5641 figures

Every figure we hold for the Casio 5641, with its source. Where sources disagree, each value is shown.

Accuracy and care

Accuracy (maker)
±15 s/month1

Power

Power source
battery1
Battery
CR20251
Battery life
2 years1

Module functions

Display
analog-digital1derived
Countdown timer
measuring unit 1 second · range 60 minutes1
Stopwatch
measuring unit 1/100 seconds (first hour); 1 second (after first hour) · capacity 23 hours 59 minutes 59 seconds1
Dual time
Yes1
Bluetooth
Yes1

Not published yet

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

Casio 5641 questions

Where is the manual for Casio module 5641?

Casio publishes the operation guide for module 5641 as a PDF: Casio operation guide 5641. The number 5641 is stamped on the case back of every watch built on it.

What battery does the Casio module 5641 take?

The Casio module 5641 takes CR2025; Casio gives 2 years of life.

Source [1]

Which watches use Casio module 5641?

5 Casio models in Casio’s manual search use module 5641, in the GBA-900 family.

More on movements

Sources

Documents checked · Report a wrong number

  1. 1Casio Computer Co., Ltd. — Operation Guide 5641 (qw5641_EN.pdf) · pdf · read
  2. 2Casio Computer Co., Ltd. — Watch manual search JSON (US locale), manual_search.support.json · json · read