What does flashing red vs solid red mean on a Blendjet?

i had one that flashed red and turned out the button itself was stuck halfway pressed. Cleaned around it with isopropyl and it was fine. Seperate issue from the battery entirely
 
i had one that flashed red and turned out the button itself was stuck halfway pressed. Cleaned around it with isopropyl and it was fine. Seperate issue from the battery entirely

That's actually a really common one. Smoothie residue gets under the button membrane and it reads as a constant press, then the controller throw an error because it thinks you're trying to start it without a cup.
 
yeah thats actually good. Solid red usually means its registering the battery again. Let it keep going till the light changes color entirely.

why does it switch from flashing to solid as it charges though, whats the logic there? you'd think it would just go straight to solid
 
why does it switch from flashing to solid as it charges though, whats the logic there? you'd think it would just go straight to solid

Deep discharge recovery mode. When the cell is below a certain voltage the BMS trickle charges it at low current and flashes to indicate that. Once it crosses the threshold it switches to normal charge and goes solid. Pretty standard for cheap BMS chips.