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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.
Not half as bad is potted in RTC batteries. As in: The RTC chip and battery are inside the same epoxy-filled package. The bane of vintage SUN hardware (and some PC clone manufacturers in the 386-486 era) collectors.