DELL INSPIRON 15R 5521 charging problem

I've now strange issue, have replaced my battery few days ago, its keeps on charging even when the indicator shows it is 100 percent charged.I ran battery diagnostics on my laptop but it passed. I calibrated the battery but no difference.

Charging indicator bulb is turned on all the time so I feel that the laptop tries to overcharge the battery. Will it reduce the battery life?

help will be appreciated.