8bitdo Remote: Trouble Charging

Hey folks, I recently got the 8bitdo remote (the zero 2), but I’m having issues charging it. I didn’t notice the light was blinking red while I was using it, so it died on me while studying. When I plugged it in to charge, there’s no red light like what the manual said there would be… is there a minimum charge needed before the light shows or do you think there’s something wrong with my remote or charger? Thanks.