Has been battery life until the last 6 months. I am currently finishing year 5 on my rechargeable unit, my understanding is the thing shuts down in year 8 or 9. It will need 1 of 2 things at that time.... A new "battery pack" or an entire new unit. I am researching "updates" for my own edification. Will study "harder" as the time nears for a change....
Oh yeah I did take a nassty fall (dislocated my shoulder) which did "dislodge" my leads the fall before I got this unit.