Is there a button cell inside the camera body that backs up settings

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Anastigmat Forum Pro • Posts: 12,686
Is there a button cell inside the camera body that backs up settings
1

Do Canon DSLR cameras use a button cell somewhere inside the camera body to back up the system date and other menu settings when the rechargeable battery runs out of juice or is removed?

Andy01 Senior Member • Posts: 4,599
Re: Is there a button cell inside the camera body that backs up settings
2

Anastigmat wrote:

Do Canon DSLR cameras use a button cell somewhere inside the camera body to back up the system date and other menu settings when the rechargeable battery runs out of juice or is removed?

I think it depends on the camera model ?

What camera are you referring to ?

Colin

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Ray UK Contributing Member • Posts: 832
Re: Is there a button cell inside the camera body that backs up settings
1

If your camera has a button cell that is replaceable then it is usually located with a section of the main battery compartment. If it doesn't have this then it probably relies on a super-capacitor to retain a tiny bit of power to enable short term memory storage. The memory retention varies but a super-capacitor can supply the memory for days or weeks.

Distinctly Average Senior Member • Posts: 1,177
Re: Is there a button cell inside the camera body that backs up settings
2

Ray UK wrote:

If your camera has a button cell that is replaceable then it is usually located with a section of the main battery compartment. If it doesn't have this then it probably relies on a super-capacitor to retain a tiny bit of power to enable short term memory storage. The memory retention varies but a super-capacitor can supply the memory for days or weeks.

Or they can use NVram, then no power is required. That is certainly in use in many modern cameras. Obviously not for date and time, but for the rest of the settings

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