If I remove the rechargeable BP battery from my Canon EOS 50D for an extended period of time, will the internal lithium battery preserve all of my settings (including custom functions, date/time, etc.)?

  • \$\begingroup\$ You'd should qualify 'extended'. Months, no problem. Years, will be because the internal rechargeable battery eventually runs out (even if on some high-end models it is replaceable). \$\endgroup\$
    – Itai
    Mar 28, 2011 at 2:29
  • 1
    \$\begingroup\$ We're talking like 5+ years. \$\endgroup\$
    – Alan
    Mar 28, 2011 at 23:19

1 Answer 1



All modern canon dslr's have a small lithium battery (similar to the one that is used to power your computers CMOS) that powers the internal memory that retains the settings.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.