I just replaced TWO brand new yellow tops. Two different cars. Neither would hold a charge if left un-started after one week. Completely unacceptable. These were in both my kids DD's - an '06 Mustang and an '05 Magnum.
I have a 10 year old yellow top in the Nomad and it works fine but I have to run a Ctek charger if it's not driven once a week.
Replaced the kids with good old fashioned Sears "gold". Gone for 11 days and they fired right up.
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