so i have two batteries for my D1 and i was wondering what is the proper way to use both of them? if i switch batteries, will my phone tell me it's dead when there is really like 30%left in the newer one? should i stick with one until it dies but mainly try to stick with one? should i alternate?
also...for my DX battery (since im currently using the d1) should i leave that battery completely full or charged when it's just sitting?