This makes the battery less able to hold a full charge as time goes on, as the plates don’t pass on the charge easily to the battery fluid When the charge in the battery fluid is allowed to drop below a certain level, sulphate crystals begin to coat the plates. Other devices in modern cars such as alarms also discharge the battery while the car is standing. And it discharges at a greater rate if the car’s battery terminals are connected. If a battery is left to stand, it also discharges. Lights and other systems, such as audio, also place a big drain on the battery. The battery discharges quickest when the starter motor is cranked to start the engine. Starting the car is the biggest drain on the battery
This enables a new fully-charged battery to maintain its charge over a period of time, by contact between the plates and the battery fluid solution that surrounds the plates. The plates, made of lead, receive a charge from the car’s charging system which operates when the engine is run. This solution contains the electric charge in your battery. Within the outer battery casing, these plates are submerged in a solution of water and sulphuric acid. The plates are also connected to the connecting poles (positive and negative terminals) on the battery.Ī solution of sulphuric acid and water carries the charge The positive and negative plates are separated by an insulator. Without getting too technical here, the energy is stored in a battery by means of a system that sees positive and negative plates placed side by side in sets of six (for a twelve-volt battery). Lead acid batteries are the type of battery generally used in modern cars, and usually of 12-volt specification. But if your car stands unused for days or weeks at a time for some reason, or is only used in city traffic, it is likely that the battery will deteriorate more quickly. If you drive your car every day for longish distances that include periods where the car is cruising fast on the highway, you may not need a battery charger. And modern cars have all sorts of power-draining systems included in their specification. Stop-start system see engines being cranked by the starter motor every time a car comes to a halt in traffic. In today’s motoring conditions, a heavier strain is put on a car battery than ever before. This is where a good battery charger comes into play. But to prevent overcharging of a battery, a car has to be run a fair distance before the charge taken out of the battery to start the car is replenished.
We explain how batteries work and which charger you should employ for those worst-case scenarios.Ī car has a charging system designed to recharge the battery fitted as soon as the engine is up and running.
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