My roomba didnt go through 16hours charging excercise. When I purchase it it has had a brand new battery I had to take the TAG out from it,It is charging approx. for 1 hour and then it goes green. It is cleaning approx 45min-1hour but then it stops. In case that I use dock button when light is still green it docks itself no problem. It does the job but then it stops in the middle of the room. i have tried to reset roomba, I have tried to reinstall battery with 30sec pressing of POWER button and I have did it for a few times in 1 row. Is there anything else what I could try?Thanks for any support and help

Vacuums - iRobot - 530 Roomba Vacuuming Robot, White Vacuum