I have an older Norelco Razor that says Norelco Smart Touch XL on it. I can't find a model number on it but I think it is an 8160. Not sure though. In the past, the screen on the razor has always shown battery life left in a decreasing digital reading. After many years of use, all of a sudden, it has gone from this digital reading to a bar like grid reading. While the razor is still functional, I prefer the digital reading. What did I do to change it and how do I get the digital numbers back? Thank You