[C320-list] Battery Logic

[Dean Vermeire]

Chris,
Thanks for the info.  That helps a lot.

On 9/21/2015 2:15 PM, Chris Burti wrote:
> Dean.
> When I researched the specs of Commercial duty 4D batteries, I found them
> to have have about 90% or more of reserve capacity compared to deep cycle
> mostly due to heavier plates and similar anti-vibration matting at about
> 50% of the cost. I have been extremely happy with the performance of my
> Exides and do cruise.
>
> On Mon, Sep 21, 2015 at 2:04 PM, Dean Vermeire <dean at vermeire.us> wrote:
>
>> As any battery discussion, this one starts with a dead battery.  One of
>> the two batteries has gone bad.  I've tested both and identified the bad
>> one.
>>
>> Our boat is a 2001 model (#847), with the original ProMariner Protech
>> 1220i charger and two #4D 12V batteries, neither of which is a deep cycle
>> battery.  Only battery #1 is connected to the charger, which means that
>> battery #2 only gets charged when the selector switch is on "Both".  This
>> is how the boat was when I bought it.
>>
>> We sail on a lake in Kansas, so it is not like I will be out cruising for
>> a week.  I really don't need to have two #4d deep cycle batteries and put
>> in a separate starting battery, change the alternator, etc.  However, I am
>> inclined to replace the dead battery with a deep cycle battery.
>>
>> So, here are my questions for you battery-minded people...
>>
>> 1.  Why was the boat wired with only one battery connected to the charger,
>> and would it be better with both connected to the charger?
>> 2.  Can you think of any reason why I couldn't have a deep cycle and a
>> starting battery on the same charger, as long as they are of the same
>> battery type (e.g. lead acid, maintenance free)?
>>
>> Thanks in advance,
>> Dean Vermeire
>> Moonstruck II (#847)
>>
>
>