Unfortunately, inefficient

This Accu should replace the predecessor who did not yield any more power. Although this is a Originalaccu to the phone, he is just as inefficient as the other was for years. Calls After 10 minutes it is empty.
I know that accus must be charged several times until they get their full power. However, this has not helped him. Too bad, so the use of my cell phone is currently no pleasure. I'll probably have to re-arrange a Accu and hope that will then last longer.