Very disappointed

I replaced my 7 yr old Remington r-845 with this shaver for the fact my old one was due to be changed, it held up wonderfully, BUT it will currently outperform this new r450. like the previous review said it has been slow and like uncharged from day one...and this is the 2nd one! I thought the first one I got was defective. I am going to try and return this one for an exchange one more time but I am not very hopeful. to review yes I charged the thing 18hrs per instructions before I turned it on. you can actually stop the spinning actuators easily from a "full charge" when after 7 yrs fully charged I cant stop my r-845 easily. I just cant replace my blades on it and Im down to 2 out of 3 as its completely worn out.