I tried changing the battery of the wristwatch "TRIWA FAST112-CL010217"

2022-06-03 2022-08-02

The battery of my beloved TRIWA wristwatch "FAST112-CL010217" ran out.

I tried replacing it myself, so here's a memo.

Preparation

This wristwatch uses a "SR621SW" battery.

It was sold at a nearby Daiso, so I got this one.

For reference, it was 450 yen (tax included) at Yamada Denki.

Something like this on Amazon?

SONY SR621SW(364) 1 piece (loose sale) Made in Japan Silver Oxide Watch Battery

panasonic Silver Oxide Battery 【SR621SW】

Search for "SR621SW"

This wristwatch is a so-called pry-open type, but it's quite stiff.

At first, I struggled with a flathead screwdriver, but it only got scratched and wouldn't open, so I recommend using an opener.

This opened it.

Namiki Trading 【4-size set】Watch Repair Back Case Pry Tool Screwdriver

I don't want to scratch it if possible, so I'll apply masking tape.

It's a pry-open type.

Insert the opener at the arrow and pry it open.

Even with the opener, it's quite stiff.

So, I'll replace the battery.

Closing it was also quite stiff.

I inserted cloth and thick paper, and finally managed to close it by clamping it with pliers from both sides.

This might not be the proper method, so proceed at your own risk.

For now, the watch started working safely.

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