If the amount of current needed by the car battery is much higher than what the battery charger supplies, it will suffer from an internal overload. When the specifications match, you can use that charger to charge the car battery. It is essential to match the specifications of the battery charger and the car battery.

It will not charge the car battery either. The problem is that drain current just leads to loss. Due to this irregular drain current, the charger needle might keep on jumping. If there is a drain current, the current provided will be irregular. The charger needle monitors the amount of current being supplied to the battery. The problem is only with the battery charger. In this case, all the components and the systems of your car ride in perfect shape. In that case, the battery needle might keep on jumping as well. Many times, the problem can be with the battery charger as well. Not always, the problem is with the car battery. Therefore it is sometimes providing higher current and sometimes lower current.Īny shorted component in the circuit can keep the needle jumping around. If it kept jumping right and left, it might indicate that something is providing erroneous reading to the charger. Ideally, it should move from right to left as the car battery charges more and more. The charger needle denotes the current being supplied to the car battery. The battery charger needle keeps jumping because of a shorted cell, short in the charging system, internal overload, excessive drain current and faulty connectors. Why is my battery charger needle keeps jumping? One such problem is the battery charger needle moving back and forth. While in most cases, charging your car’s battery is a straightforward procedure, you often might encounter a problem. The more miles you cover, the faster this will happen. Sooner than later, you will have to charge your car’s battery.

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