Ok, I think maybe we should start another thread? cos I think some people is not getting the issue, is not actually the single "Service Battery" message, which annoys, but it doesn't matter, I understand now Snow Leopard alerts when the battery is old, the point is, first, the sudden lost of performance in batteries and secondly, and this is the most important, the sudden shut down with no warning at all when battery is still 50% or 60% or even 70% (seems random).
I don't know what else to do, I don't want to spend more money in a battery when mine should last at least another year or so, and I think this is a real issue, not coincidence, which I can even prove, booted from Leopard 10.5 DVD and worked fine for about 2 hours, then got the low battery alert, also installed clean Leopard in USB hard drive and same thing, work normally, but if in Snow Leopard, battery will last less than 30 minutes and shut down with no warning.
I encourage people to do so, just boot from the original Leopard 10.5 DVD, stay there for a while, you will see the battery icon on top right, see if it does something wrong. And wait until it discharges, see if you get the alert message. Do we need more prove?
If I go on my own to the Apple store, I am sure they will insist to get a new battery, I'm from London, is there many people from London here? Would be nice if a bunch of us go there, pacifically and politely, and ask for help, maybe that way we will get their attention.
Jose.