Chosen Solution
So I had my 3ds run out of battery about 2-3 months ago and so I bought a charging cradle thinking it would start charging and it didn’t. I put the charger at angles and then still nothing. What is wrong with my 3DS?
Sounds like your battery has failed. Time to replace it. Nintendo 3DS XL Battery Replacement Nintendo 3DS XL Battery
Use a separate 3ds system (example: Charging a 3ds battery with a new 3ds) It could be a problem with the charging port.
