I finally had to replace my fob key battery after 7 years. My second fob key was completely drained years ago ( never used) but my original fob still had a little juice left but I finally replaced it since owning my G. How's that possible? Haha

 

Yeah pretty sure Infiniti uses some pretty good batteries ha my spare fob still has the original after 10 yrs and it works and I replaced the one in my main fob after 9.

 

CR2032? Mine lasted all of three years.

 

I don't think it uses that much battery power either, since my dollar store batteries last me about 8 months to a year and they only cost like 40 cents.

 

I had to replace the CR2032 for my G since 2011, so I'd say every 5 years.
just grab set of these from Target, like 7 bucks

 

Mines been saying low battery for like 2 years.. safe to say they last a looong time if even on low charge they keep going.