I have the option to charge at work using a 120v outlet, after work where I exercise 240v, then when I get home on 240v. Will charging multiple times a day (on different voltages) effect battery life? Should I only charge a few times a week when I really need to add range? Honestly I could get by only charging 3x a week. I certainly want to extend the life of my battery and would like to know what the best practice would be.