Good morning all. Because my wall clock always turns off early so this morning I ordered a new wall clock to save more battery. Since my wall clock always turns off within a few months, it usually lasts longer if the engine is good. It can be up to 1 year more if the battery is new, but my wall clock is only two months away from the battery even though the battery is new. Indeed I bought a clock machine separately because the first one was broken so ordered a clock machine for 1$ to get 3 clock machines. That's why the battery runs out quickly because the engine is not good, now I have ordered a new one, hopefully it will last longer.☺️