Thread: Some Deep-Cycle Battery Info

Some data about minutes of RC per pound and cost per minute of RC. I chose to do only the larger batteries in Groups 30,29 and 31 which are essentially the same size.

This is information about deep-cycle performance, but most of these batteries can be used as cranking batteries if they meet your outboard CCA requirements. You can use this data when comparing cranking batteries if you compare CCA first.


Most of these batteries are marketed under multiple labels, so I noted that in the footnotes. Cost calculations were done with the cheapest version I could find at regular retail. Sale prices aren't reflected in the numbers even for batteries that are commonly on sale. Also be aware that warranty on the same battery may vary significantly under each label. For example, the JCI 29 battery is warranted for 3 years free replacement as a Diehard but only 18 months as an Interstate.

Also note that battery specs and labelling can change without notice, so pay attention to labels when you buy.



AGMS in order from highest cost per minute of RC to lowest:

Battery	Price	Reserve Capacity(RC)	Weight	Minutes/Pound	Cost per Minute of Capacity
Diehard PM-11	$295	205 minutes	75lbs	2.73min/lb	$1.44 per minute of RC
Optima D31M	$220	155 minutes	59.8lbs	2.6min/lb	$1.42 per minute of RC
Trojan 31 AGM	$239	177 minutes	69lbs	2.6min/lb	$1.35 per minute of RC
Cabela's AGM 302	$240	190minutes	62.8lbs	3.02min/lb	$1.26 per minute of RC
Duracell 31 AGM3	$180	200 minutes	69lbs	2.9min/lb	$0.90 per minute of RC

Conventional Batteries in order from highest cost per minute of RC to lowest:

Battery	Price	Reserve Capacity(RC)	Weight	Minutes/Pound	Cost per Minute of Capacity
Trojan SCS225	$230	225 minutes	66lbs	3.4min/lb	$1.02 per minute of RC
Exide Nautilus NG-314	$148	205 minutes	62lbs	3.31min/lb	$0.72 per minute of RC
Duracell 315	$95	185 minutes	59lbs	3.14min/lb	$0.51 per minute of RC
Everstart Maxx 296	$100	205 minutes	61.7lbs	3.32min/lb	$0.49 per minute of RC

Notes:

1. Also sold as the Odyssey 31M-PC2150
2. Also sold as the Universal Power Technologies UB12110
3. Also sold as the Deka Intimidator 8A31DTM
4. Also sold as the Delco Voyager Pro 31
5. Also sold as the Deka Marine Master DC31DT
6. Also sold as the Interstate SRM-29, Duralast 29DP-DL, Diehard 29HM and ACDelco Voyager M29MF

Excellent info! Thanks