Map 2 device to Map 3 Map device street names

Hmmm, just out of curiosity , I read somewhere about Optimize Nav2 to Map3 Map. I'm wondering whether I suppose to do that also, that's one thing I never did do.

One other odd thing. I know I replaced the internal battery in the TomTom device about 4 years ago. never had an issue with it until recently.

In the interface the battery icon shows 3/4 full , then few seconds later I get a battery symbol saying very low then switches off unless plugged into an external power source. Maybe time for another new battery.