Some AGM batteries claim to work both for starting and deep cycle.? I
have one of these in my BJ8; it's overkill, IMO, but I was getting tired
of cleaning out the boot from battery spillage:
https://www.batteriesplus.com/productdetails/sli24agmdp
On 1/10/2018 8:53 AM, Reinhart Rosner wrote:
>
> If you hook up two 12 V batteries, this would not harm the electrical
> system. It only is kind of overkill - like putting a battery from a
> big truck in a tiny car. You have more amps available than you can use
> and of course more weight than necessary. But the standard dynamo
> probably will not be able to charge these bigger batteries as it only
> delivers 22 amps.
>
> The 100 needs 50 amp.hr. at 10 hour rate. And it got two 6 V batteries
> (inline, so together 12 V) that can be mounted easier in the small
> space behind the seats. If you find a small 12 V battery that fits in
> there this might be another solution.
>
> Gel batteries are fantastic for their purpose which is to deliver
> current at low rates for a longer period. In a car the type of current
> you need most is short and high power for starting. Here the classic
> acid battery has its advantages and it can be recharged faster than a
> gel battery. And the gel battery needs a special charging device. The
> dynamo in our cars is built for charging acid batteries and would
> destroy a gel battery.
>
> Another solution might be an AGM battery (Absorbent Glass Matt) which
> is the newest development in acid batteries, where the glass matt
> completely binds the acid. These batteries are put together under
> pressure and therefore won?t loose acid even if you mount it upside
> down. You only have to search an AGM that is built for starting (and
> not for long term delivery of current). And you can charge them with
> all classic chargers. Biggest disadvantage is the price.
>
> For the needs in our cars the classic acid battery should be the best
> choice.
>
> Reinhart
>
> Reinhart Rosner
>
> 55 100 BN 1
>
> Vienna ? Austria
>
>
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