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Special purpose batteries                        

Special purpose batteries could be better described as "batteries used for special purposes".

The use we put any given battery to will inevitably determine its performance and longevity in that role.

Hence, it is imperative to select the correct technology for the task.

Perhaps the performance will be affected less than the duration of duty. This is why we see batteries used incorrectly.

One may argue that it is working OK.

However, at the end of the day are disappointed with the length of time it has lasted.

Without getting too involved, Lead acid batteries, apart from the technology of there construction, IE Flooded, AGM,

Gel or some combination of hybrid recipe, are used to either dump current (starting)  - Cycle as in a golfcart or

float as a UPS device.

A battery used to start another engine will have thin porous plates to assist chemical reaction to act quickly for

instant high current demands.

This unit will have thicker dense plates to last many discharge and recharge cycles as would be expected

in a forklift application or similar. Used all day and recharged all night.

A battery in a floating application would be expected to retain a fully charged state,  possibly for years waiting

for the day it must respond to duty. This is a power backup system in case of power outages for the

telecommunication or power supply industries and of course, your computer and others.

It is not possible to generalise accurately but a flooded battery may be good for starting, an AGM may be

good for floating and a gel may be good for a cyclic life. And as always, their are variations and exceptions of these.

A couple of examples:

Now these applications are pretty standard but what about the battery to perform for say 3 days in a remote

unattended location. to power monitoring equipment . This battery may be subjected to altitude and diurnal

temperature variations ranging from below freezing to maybe +30 degrees. The application is cyclic because

after its duty it will be recharged ready for reuse. But when it comes to sizing the battery, the temperature will

have an effect on deliverable amphour capacity. This  effect  is demonstrated below.

It doesn't matter which battery this particular scale relates to, the point is that each battery is affected by

temperature and is a consideration.

I was approached by a group who where using an electric motor to power a small underwater swimming aid

(like a torpedo) and could not get the performance out of the batteries they chose. Their choice was

mathematically correct  but they had not consider the environment in which it would be operating. ie, 5 degrees.

This low temperature reduced the capacity of the battery by  13% (according to the table above). 

It fell short of their expectations.

The point I'd like to make here is that when you need a battery for a special purpose, a little investigation as

to the environment it will endure and the performance needed is a must.

It would then be possible to narrow the search down and make the best selection.

There are also of course, batteries made for special purposes but unless you are the developer,

the best battery will have been specified. Follow the recommendation.

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Model: Vertex Drycell V1220 and V1220HD

 Lighten up your race car!

Remove the heavy 20KG battery and replace it with the BatteryDirect 5.8KG Vertex Drycell.

The Vertex produces more power per pound than any battery on the market. It has the cranking power

of wet cell batteries three times its size! This is due to the extremely low internal resistance which allows

faster, more consistent starting. The Vertex does not have a cold cranking amp rating, but has been tested

to crank engines with compression ratios as high as 13:1. The reserve capacity of the Vertex is 20 AmpHours.

The Vertex Drycell is truly maintenance free and can withstand the rigors of high performance and racing

environments.

The Vertex has an excellent storage life and recharges very quickly. Any 12 volt charger can be used to

recharge the Vertex but a low amperage battery charger/maintainer, much like the charger/maintainer

we sell is recommended to avoid overcharging the battery.

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