The safest answer is yes, it is best to remove batteries for storage. If the light is a simple circuit, then it would be fine to leave them, but it is hard to say.

Any item not in use for a sufficient time should have the battery removed. The battery is still "in use" in the item and will drain power if not removed. "Speaking from experience."

Available at drug stores, large grocery chains, Walmart, Target, KMart, etc.

Anywhere you see the Energizer Logo

Stacking 2 2016 is not recommended to replace a 2032, because you will get 6v of output from the 2 when stacked, and if the system is only 3v, it can cause damage.

I own a watch and clock repair shop and am familiar with your watch. It does take a standard 2032 3v Lithium cell. Some places that replace batteries can charge seemingly high prices but I can tell you it is worth it to have a professional do it. There are many things that can go wrong in the process if someone that is inexperienced attempts it. The reason for the higher price is generally that because the watch is more expensive than a simple Timex, the can be additional time involved, as well as the fact that costs of mistakes are higher with expensive watches.

With a watch like that, I would recommend that you take it someone that does watch repair, and has a good reputation.

As far as Cell life, with the Energizer Lithium, it should last you 1-2 years, maybe more, depending on conditions.

That kind of c ode sounds like a state where it was manufactured.

I assume the PD stands for "Production Date" and the ED is "Expiration Date", so there should be another 2 letter code somewhere else on the package- So YES, you are correct .