Any Tips on Using Automotive Memory Savers?

I recently had to disconnect my car battery to fix a few things under the hood, and I noticed that my radio presets and clock reset. I heard about these automotive memory savers that could keep settings intact during such times. Has anyone used one before? Do they really work, or is it just a gimmick?

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I don’t believe it is required. After replacing the battery on many new cars, the dealer procedure probably involves resetting the battery monitoring system.

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Simply connect the old car battery to the car’s terminal using a jumper cord if it still has a little amount of charge, then carefully lower the new battery in and presto! Otherwise, why not just switch it out, except from the radio settings?