I wouldn't be as concerned about the name on the battery as the info on it. A good starting battery will have have high cranking amps, while a good deep cycle will have a high reserve capacity (usually in minutes). For a deep cycle I try to buy one with at least 180 minute reserve, which may be the Series 29 battery, or a 200 minute which I believe is a Series 31 battery. Reserve capacity is based on a 25 amp draw/hr.
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