I like the idea of only having to change the batteries every few years but I think if you still have them mounted to the boards its a gamble im not willing to take. Every product has a failure rate. If you get comfortable with leaving them in for 3,4, or 5 years eventually one is going to fail and leak. Energizers, Duracell, alkaline or lithium, doesnt matter they are not 100% fail proof. Everything fails, some more than others but nothing is perfect. I will continue to change them once a year.