Blinking Orange Light Fixed Itself?

So I recently acquired a DSI XL from a garage sale where it has previously just been used by the owner’s kid. It had a few little scuffs but nothing major and all buttons and screens work perfectly. I’d already charged it about 3-4 times to full battery since I’d been using it to play old Pokémon games, but today I found the light blinking orange and then it took longer than usual to power on. It’s currently charging again and isn’t doing it at the moment but I’m worried that something might be wrong. Any help would be appreciated since I keep seeing everywhere the a blinking orange light is like a death omen for DS’s.