8 years. That's sounds pretty good. Perhaps too long.

Yeah, I'm pretty satisfied with that kind of life from a battery. My A&P
says it lasted so long because we fly often, and kept the thing charged up.

He also thinks our new (in March) wing-tip landing lights probably were the
kiss of death for the old battery. It was probably weak, getting weaker,
and then I put that big ol' load on it. (The amp-meter shows over 40 amps
with everything on, which means the alternator probably can't keep up when
taxiing....)
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"