These tiny adapters may "appear" to be the right charger/connector (even to young men working at Best Buy LOL), until you try to plug it in. This chart (on Amazon) helped me to find the correct replacement for my lost MP3 charger/connector.
Resultado de imagem para carrinho para ferramentas feito de madeira
Meter Settings AC/DC
Choosing Parts for Building a PC | Infographic on Behance