The cat knows when to recharge the battery. Your battery won’t be affected much. However it may cost more because it needs to have a higher capacity.Do most people who add aftermarket stereos/subs disable this system? If you alternator isn't running you're going to kill your battery life by running on the battery only at every stoplight especially if you're running a bigger system.
Also seems like a problem for AC if you're in traffic and hot weather?
I likely will try to find a module to disable this like they have for the other vehicles.
I live in the country we have little to no traffic so this will just annoy me. If you commute in LA traffic everyday maybe it will save you some MPG or the environment but I have my doubts it would make much difference.
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