sorry i was a little late to this thread been really busy.
ok first off this isnt a big deal because the watch will only need to have its battery replaced every 3-4 years about. for luminox you just send it to the repair center and they bill you. its not very expenisve. 27 for the replacement and the testing and pressure sealing. Really that peanuts to shell out, assuming its three years on the dot then that averages 9 dollars a year which is such a small amount of money in ther scheme of things. thats a 2oz pour of good whiskey, a 16oz glass of craft beer, or a couple rounds of skee-ball. In other words its a negligible amount that you could easily blow without thinking about it. its not going to be a major operation where they tell you: Im sorry mr fish but there appears to have been a complication the total will now come to 80 dollars. its pretty cut and dry.
additionally the luminox has a mechanism that makes the second hand skip 5 seconds when its running low so you can notice and replace it before it flat out dies. if the eco drive watch has a problem then its going to be an expensive overhaul. the eco drive has just never appealed to me that much, fine watches even the likes of patek phillipe use batteries and it has vetted the battery wrist watch. Eco drive on the other hand is relativley newer and theres no real garuntee that there wont be a bug. Id just get a battery run watch and not worry about it, unless its a hardcore watch like the luminox they wont even have reprusserize it i think that only even starts at 20 BAR ie 200 meters worth of resistance.
I like nice things, i pay a little more, i take good care of them and they always work when i want them to work.
hope this answers your question.