Ipod shuffle 2nd gen blinking green while charging using a power bank (usb battery pack)

[elder parcel]

Hello, i got a ipod shuffle 2nd gen that my mom saw in a drawer just i think last month, i tried everything last month to revive its old battery but it did not charge, only sync in pc and when chariging, the old orange 4 times showes then nothing.

Fast forward to now, its connected to a ugreen power bank (i saw somewhere in reddit that plugging it in a power bank/usb battery pack, it will kickstart the battery and after some time, will charge normaly so thats why im using a ugreen powerbank right now that my dad is using for a portable spotlight for camera since he is a photographer for fun runs) and is it trying to charge or still dead battery since i think last use of this ipod is from 2011/2012 (i was still a baby during those times btw so no memory of me using it/seeing it untill last month)? but from the vid, its blinking green. Sometimes orange then green blinking and sometime just green blinking. Am I making progress or I still need to replace the battery?

Btw, if I need to replace the battery, im planning to buy an ipod classic 5th gen next moth anyways from a seller in my country and i might just put the shuffle somehwere in my room with a old working ipod touch gen 4 as like im just displaying it

Update: just unplugged it from the power bank since my dad will put it back near the spotlight