iFixit is the best DIY electronics repair site ever. I¡¯ve repaired tons of stuff with their guides and their tools. And sadly you¡¯re right about some of the commenters :-(?
This is off topic for the subject of this group, but almost everyone here will be faced with this eventually, and the people here are tech-savvy folks fully capable of doing what I did, so I'm sharing it anyway.
Tonight I did something I've been planning (and to some extent dreading) for several months. The buzzards have been circling for the battery in my Samsung S10e smartphone for quite a while, but I didn't think paying someone to replace it would be worth the money. So I replaced it myself, using an iFixit battery and repair kit, plus their online repair guide.
And the job went fine. I've installed batteries in electronic devices before, but modern phones are waterproof, which means
the back covers are glued on with heat-sensitive adhesive. The part I feared was removing that cover, since you need to apply enough heat to soften the glue, but too much heat applied to a lithium battery could do very bad things. (The warning in red in this photo, and similar ones throughout iFixit's online guide, definitely focus the mind).
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Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD