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A couple other points on the odyssey
battery.
1) Probably everyone knows this but just in
case: A std aviation battery will sulphate if you leave it on the
shelf for a year. this happened to me so at that point I had a
choice of buying an expensive de-sulphating charger or buying odyssey batteries
which don't have this problem. I bought the batteries.
2) the pc680 is called the pc680 because it
provides 680 amps for 5 seconds. Similarly the pc625 provides
only 625 amps for 5 seconds. However, in every other cranking
metric: "cranking", "cold cranking", "hot cranking" the pc625
outperforms the pc680. It also has more total storage capacity.
On my airplane, the cranking situation I'm most worried about is in the
air, trying to get the prop out of feather. (k. we just had
the debate about props and their handling so we don't need to do that
again). I decided cold cranking amps is what I care
about.
details are available here:
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