There has been alot of discussion about this on the Cardinal owners
site lately. It appears that the RG batteries are good only if you fly
alot, flight schools are good places for them. If flown infrequently
(less than once a week)then old style wet cells last longer.

Regards,
Bruce Cunningham
N30464




NVArt wrote:
Bought my 172N 10 years ago: had a new Gill 24V lead/acid battery in
it. Three years later, cranking speed diminished slightly, so in goes
a
new one. Three years later, another one. Hmmmm. Batteries must last
about three years. Arguing with success, I got one of them thar RG
Concordes from Aircraft Spruce when the last Gill slowed down. After
a
little less than a year, cranking speed diminished slightly. Then
stopped altogether. Cowl off and on for charger hook-up several (too
many) times. PITA Called Aircraft Spruce. No problem; just send
documentation that came with battery (o.k.) and copy of log books.
Huh?
I didn't have to send copies of the logbooks when I gave my credit
card
number to buy the battery. Logbook copying, besides being none of
their
business, is onerous, time consuming, and burdensome. So fukit;
called
Sky Ranch for another Gill. Life back to normal.
I guess I'm just gettin' old and cranky. Flame away if I'm too far
beyond left field.

Blue Skies
N5217D based HTH