Replacment battery doesn't charge

This is written in early 2026.

Richard, I'm an electrical engineer in the US in similar circumstances. My LG Gram 17 from Costco in 2020 has a failing 80 watt battery. None of the 3rd party batteries sold on the internet will work in it, only the original LG battery that was shipped in the laptop.

After posting on reddit I concluded that LG changed Gram 17's design before my unit was constructed to require batteries supplied only by LG. Said differently, the computer after a certain manufacturing year digitally handshakes with its battery to determine the maker. The laptop disallows any non-LG batteries.

I suspect that the very credibly designed Gram batteries sold on the internet were at one time compatible with LG Gram computers, but not more recent ones. These online sellers are not sufficiently informed to know that, and advertise that their batteries work on all LG Grams. They don't.

It would be nice if the computer's screen bluntly announced "this battery isn't compatible with your computer and so I will ignore it" but doing so would probably put LG afoul of "right to repair" laws enacted recently in many states.