Ibrahim, I really believe that you are in the minority with respect to switching battery types in the same device. Seems to me that, if it could be done without a hassle by the Springer folks, the proposal I offered, where the setting is saved when batteries are changed, offers a good compromise. I think the number of people who stick to one or the other type would greatly outnumber those who switch types, and this suggestion would thus be a convenience factor for more people. I haven't seen anybody yet post that they often change battery types with their BC. Just my 2 cents. Mary