Interstate Deep Cycle Marine Battery SRM-27 Review

When it comes to Interstate batteries, the SRM-27 is one of the better marine batteries to go out of their well-deserving lineup of high-performance deep cycling batteries.

Yes, it may not really compare to the other models coming from their list, but it packs a metric when delivering “the goods” nonetheless—and that is a good thing.

As a mediator between the other SRM models, the Interstate deep cycle marine battery SRM-27 is something you will want to look out for in your search.

Product Review For The Interstate SRM-27—Is It The “Best” Deep Cycle Marine Battery In The Lineup?


This response is going to be an up to the first kind of answer: “the best” is variable and subjective but if you are a common type of consumer (neither beginner or advanced), you will probably love the SRM-27.

Now, taking a step back, check out these “goods” or performance metrics for the SRM-27:

27 in battery group size, but check out if you look for SRM-24.
CCA rating of around 600 “cold” cranking amperage
Reservation Capacity (RC) of approximately 160 by way of minutes at around 25-amperes per hour
Warranty levels for about 12-months

Despite these “goods” or specifications or metrics, you can be sure (or sure enough) that the SRM-27 does not stray too far from the higher tier battery lineups you will find up the food chain—it will perform better than the lower end, but at a smaller budget of allowance (which is a good sign, anywhere).

And, mind you, the CCA and RC are nothing to sneeze at even if the SRM-27 does not reach the higher tier battery lineup list—it still manages to be neck and neck in the budget range as the lower tier ones (it’s still a win).

Tell Me: What Are Group 27 Batteries, Anyway?

This concern is a good question, and you are probably going to need it when you compare different batteries outside of the battery lineup in Interstate and even inside their battery lineup.

Okay, the “27” in the SRM-27 is crucial because it indicates group battery size, which means the “total” or “overall” number of current capacities a battery is able to bring forth when in an exchange from, say, a cell to the motor or engine of a boat and car—respectively.

And so, indeed, the group size of battery influences so much like the “current capacity” of how much amperage a cell can give per hour

And, when it comes to marine boat activities, amperage (currents) matter:

For faster (and safer) re-charging
For longer reservations of capacity in deep-cycling
For a balance in control when it comes to voltage exchange and temperature

It only makes sense that a “somewhat larger” group battery size can spell a difference.

An Aside From Interstate Marine SRM-27, How “Long” Do Interstate Deep Cycle Batteries “Last”?

This statement is a crucial question but one that leads to a somewhat short answer: You can tell by the “minutes” in the reservation of capacity.

In the case of the Interstate deep cycle marine battery SRM-27 model, you possess an excellent 160 minutes which is a little over a good 2-hours (minimum) for you to resume and power up your boat applications and stay in the water and make it back safely for a re-charging session.

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