Battery problem

[Scouseindehouse]

Hi,I'm 57 from lreland and have built an ebike about a year ago now. I have a problem with the original battery a 48v 1500 w.it charges to 51v but cuts out at 47v and still seems to have lots of power. I plug it out and back in and it runs for a short time and cuts out again and again. I'm wondering if it a bms problem ..can anyone shed any light on the problem, thanks

 

[tomjasz]

If you use Farcebook there are good battery pages.