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Originally Posted by JeffW
Conventional batteries don't like to be dishcarged very deeply. That will shorten their life considerably. Yellow top is a "deep-cycle" battery which is designed to be allowed to discharge deeper between charge cycles.
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I have run both Yellow tops and Reds. My experience is Yellow Tops do not like to be charged frequently. My wife's constant short trips tended to kill a Yellow top in less than a year or two. If your charging profile is frequent short charges, and primarily starting, then the Red top is best. 5 years from a red top is easy and they take the abuse of trail driving like no other battery.
If left disconnected the low self discharge rate means they can sit unattended for a year and still maintain a charge. They also do not vent gases, so that battery box and vent setup are not needed and they can be charged at a high rate that takes advantage of the 125 amp alternator in the H3.
My first modification to my new '07 was to place a Red top 78/34 into the battery slot.