I am finding they do not live up to advertised lifetimes as well. Out of a batch of 4 I replaced the first 1 in 6 months the second after a year. We will see how the last 2 do. But so far I am not impressed with the lifetimes.

Good thing is I got them from Costco so I can return them no questions asked if I lose the last 2 in the next 6 months.