I have had a Red Top in the Commander for a couple of years with no problems at all.

I just put two Blue Top Optimas in the Stacker for the Car lift and other 12 volt uses.

One important thing to know if you are using two 12 volt batteries in parallel is that you should connect the positive cable to one and the negative cable to the other. When you connect both cables to one battery and simply wire the other one in parallel you end up depleting the first battery faster and if will fail before the second. It seems like it would not matter, but it does. Just a heads up.
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