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Soldered-on RTC batteries (with type covered as a bonus)
(i.imgur.com)
This is a community for designs specifically crafted to make the experience worse for the user. This can be due to greed, apathy, laziness or just downright scumbaggery.
I was just going there... Couple solders to the existing connections and you're in business. Total cost? 4 dollars for equipment and a bit of time.