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Leisure Battery Question


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I have just perchased an 80ah leisure battery with an Accubox.

There is a fair amount of space around the battery as the box is quite a bit bigger.

Would it be a good idea to pack the gap with polystyrene foam to keep the battery warm and extend the charge life or does this cause other problems?

Thanks.

Mike

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It wont make any appreciable difference apart from physically protecting the battery a bit.

The story about batteries discharging if stood on concrete is a bit of an old wives tale. In the distant past when battery cases were made from hard rubber they developed micro cracks which if stood on damp concrete or a wet surface would self discharge. Now that battery cases are made from plastic this doesnt happen.

 

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The capacity of lead acid batteries does decrease with temperature so packing polystyrene around it will do no harm and will help keep the small amount of heat generated by your slow to moderate discharge within the battery. The heat generated will never get excessive so go ahead. :smile:

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Alan

Edited by symmetal
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23 hours ago, MikeSE19 said:

Would it be a good idea to pack the gap with polystyrene foam to keep the battery warm and extend the charge life or does this cause other problems?

Insulation only slows down the rate of heat loss (or gain). it doesn't prevent it. So if you battery is insulated, but still stands in a cold obsy over the winter months it will get just as cold as if it wasn't wrapped in polystyrene. The small amount of heat produced during either charging or discharging won't have any effect in the long term.

 

Polystyrene foam can also absorb water, so keep it away from any electrical connections. It is also flammable. If you do decide to insulate your battery, I would look at better materials than this.

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If your keep your battery indoors when not using it (most of the time with the cloudy nights we've been getting lately :) ) a layer of insulation will keep it warm for an observing or imaging session.  The advantage being that a room temperature (or at least near room temp.) battery will ensure that it performs at its best.  Don't forget that the rate of a chemical reaction (which is what a battery does to produce electricity) roughly halves for every 10° drop in temperature - so a battery outdoors at 0°C will only be able to work at 1/4 of its rate (1/2 x 1/2 = 1/4) at 20°C.

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