ORIGINAL: highhorse
The only caveat that I am aware of is not unique to 123's. Most switches don't open BOTH the ground and positive wires, and this can cause charging issues when trying to charge both batts on one time.
You're exactly right Don. I also have been using two 123's on my jets and just make sure I can unplug one or the other for charging, so as to separate the ground wires. Otherwise, these are
great batteries with no real negative qualities.
Craig