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by Roger Kovaciny on February 7th, 2007

Roger Kovaciny

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I put a deep-cycle battery in for the back part of my RV so it's not so likely to go dead. Price is the same as a regular battery. So why aren't all batteries deep-cycle?

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Answers. 2 helpful answers below.

  • by nfntjy on February 7th, 2007

    nfntjy

    Here is a nice FAQ on Deep-Cycle Batteries:
    http://www.windsun.com/Batteries/Battery_FAQ.htm

    QUOTE: "Using a deep cycle battery as a starting battery
    There is generally no problem with this, providing that allowance is made for the lower cranking amps compared to a similar size starting battery. As a general rule, if you are going to use a true deep cycle battery (such as the Concorde) also as a starting battery, it should be oversized about 20% compared to the existing or recommended starting battery group size to get the same cranking amps. That is about the same as replacing a group 24 with a group 31. With modern engines with fuel injection and electronic ignition, it generally takes much less battery power to crank and start them, so raw cranking amps is less important than it used to be. On the other hand, many cars, boats, and RV's are more heavily loaded with power sucking "appliances", such as megawatt stereo systems etc. that are more suited for deep cycle batteries. We have been using the Concorde SunExtender AGM batteries in most of our vehicles for some time now with no problems."

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  • by 68 Charger on July 20th, 2008

    68 Charger

    Deep cycle batteries are designed to go dead and be recharged repeatedly. Standard batteries are designed to stay charged.

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