Other best place to buy replacement battery for old (4 year old) Samsung smartphones instead of from Amazon?

[mi3ka]

Previously bought battery from Amazon but with lower battery life and span. Not sure if it was even an original samsung battery and even how old it already was.

What is the best place to buy original replacement battery for old (4 year old) Samsung smartphones instead of from Amazon?

 

[Heisen]

What is the best place to buy original replacement battery for old (4 year old) Samsung smartphone

Samsung authorized service center.

 

[roniistar]

For things like batteries, it's better to buy from authorised service centres.

 

[?dOuBtFiRe?]

Samsung service center is the best place like @Heisen said.
But they will do the service themselves. Better them but at a incremental cost.

 

[mi3ka]

so expensive $$$$
no alternatives?