M365 won’t turn on

I've had this Xiaomi M365 for a long time, so I wouldn't be surprised if it's just dying out.

Recently, the battery started cutting off (the lights in the dash would stay on but there wouldn’t be any power at all, then power would randomly come back) and the scooter would just randomly turn off every now and then.

Now the scooter won't really turn on at all. But occasionally, I'll click the power button and it'll turn on and everything works.

When I plug in the charger, the charger light that's usually green at full charge, turns red for a little bit and then turns green again as if the battery is fully charged. So I feel like maybe the connection is loose or something, but does anyone know if this is a common problem on the scooter?