Misc Nintendo Switch Battery Issues

[FlagXRvl101]

So i have a Nintendo Switch from 5 years ago. It does show its age with: Broken casing, using 3rd party controllers, joy cons sliding out and Finally Battery issues.
To Describe it simply, when i charge it, the switch is fine, but when i leave it with the charger unplugged it starts rapidly lose power even when it's powered off.


Short Answer: Even with my switch off, it loses power in a dramatic Rate.

Hope you guys help on this issue

 

[Hayato213]

Probably need to get either a new battery or a new unit, as the battery doesn't hold enough charges.