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I have canon sx40, I am using it for three years, from last month in the start time always it comes set time and if I skips then taken images takes 1980 as date, I can not understand what is the problem, is there any internal battery in camera, do I need to change it ?

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  • If you can charge the battery in the camera on that model, you might be able to keep the clock powered. That's not common on Canons though and would need a (possibly expensive) accessory charger/power supply. – Chris H May 27 '16 at 15:21
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The SX40 uses a rechargeable built-in date/time battery. They are supposed to keep working for about 7 years, but it appears yours has died a little early.

It is not user replaceable.

You will need to continue setting the date each time you remove the main battery, or you could have Canon replace the date/time battery.

Canon SX40 User Manual

enter image description here

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