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Re:Tesla’s former CTO is building a giant lithium-ion batter... by drrotmos on Saturday August 29, 2020 @11:54AM (#24316953)
You can still make a device with easily replaceable batteries water resistant (or even water proof), but it's easier (read: less bulky) to do it with a non-replaceable battery.

Compactness is definitely a major tradeoff though.

Re:Tesla’s former CTO is building a giant lithium-ion batter... by guerrilla on Saturday August 29, 2020 @11:59AM (#24316998)
Yeah, my Galaxy Xcover is IP68 (dust/water resistant) and the battery is trivial to replace. I think the situation is the same for CAT and other rugged phones.