Speaking of the watch battery, this is used by the cell phone's internal clock chip.

All you would need is a power source of some sort, maybe something as small as a watch battery.

It was a metallic, button-shaped disk, about the size of a watch battery.

We'd attach a 15-cent red light to a 10-cent watch battery and sell it for $6 in the discos.

The watch battery is another critical part that might fail under extreme liquid pressure.

Can be small, but they're usually bigger than a watch battery.

He hands Loos a tiny device the size of a watch battery.

My watch battery ran out and I had to spend $11 to get it replaced.

They are often sold as cheap watch batteries too, and sometimes by people who do not know the difference.

I did everything from cleaning toilets to changing watch batteries.