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Car Battery

Car Battery

Salam everyone

I want to ask that which battery do u have in your car and its average life and power rating?

Why doesn't cars come factory fitted with dry batteries here? and what are the advantages of one over the other?

Thanks
Gari.pk User 4216 asked on 14 Jul 2010 14:14:48 pm
1 Answer
723 views |
Awais - on 14 Jul 2010 14:14:57 pm
dry batteries are very brittle inside and may crack within due to shock and vibration rendering it useless considering the roads of Pakistan.

Even the so called MF sealed batteries you buy are wet type - they have calcium instead of antimony added to the lead to strengthen the plates and make them hold the electrodes in place..

The problem with lead calcium batteries is that they need 14.5 or 14.6 volts to start bubbling their electrolyte and hence fully charge themselves, no doubt they dont evaporate the electrolyte so quickly to find the cells bone dry in a year - but they do evaporate the water in the electrolyte of a period of years uptil a time there is only acid in the battery and hence the travel of electrons between the negative and positive plates slows down to a trickle forcing the plates to sulfate themselves and - hence dead battery results.

The oldschool lead antimony batteries need 13.9 volts to fully charge themselves but lose water due to evaporation. (which needs topping up)

Your average japanese cars alternator is usually regulated at 14.0 volts - it shuts down when the voltage reaches 14 - and not 14.6 - hence your lead calcium battery will not charge fully and start to sulfate its plates till the working surface area of the plates is left minimal.

Hope it helped
 

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