Last question for the day for me, how often should one replace the round lithium batteries (the 3V ones like the one in Family Guy)? I finally found my FG backglass keys (was worried I would have to drill it) . . . was surprised to see the type of battery it was . . . how often does that need to be replaced from a conservative point of view (or is there still the risk of leaking at all)?
Thanks in advance.