As people already responded in your other thread, you have given no reason why you would want to switch from one battery to another. Nor have you explained what problem you are trying to solve and what your ultimate goal is. This makes it very difficult for you to obtain the right answer. As it stands people can give you lots of answers, but most likely they will all the be the wrong answers due to lack of information about the problem.
Recommendation:
Explain what it is you are trying to do, without trying to propose any kind of solution in your explanation. Don't mention switches, resistors or anything like that.
Ask people to suggest to you the best solution to your problem.