An amp meter charger aware the user of the number of amps entering the charger while it’s plugged in the socket and preventing it from overcharge. It further gives essential information about the battery, its current condition, its life duration, and in case any problem occurs in the battery the user will be well aware of it before any troublesome incident occurs because the user might have fixed the occurring problem once it had shown on the ammeter.

Connecting a Battery Charger to the Amp Meter 

First of all, the user should know how to connect a battery charger to the amp meter. Initially disconnect the battery from the car by detaching positive and negative leads from the diodes. A screwdriver must loosen the clamps so that lead can be easily removed; hence the battery is now disconnected. It is preferred to detach positive lead first to be safe and ensure your car is off. Now take the leads and connect them with the charger. Connect positive lead with the positive terminal and vice versa in other to operate. If the user is confused about either one, then the red clamp is positive and black is negative.


Now, as the charger is connected, it’s time for you to monitor and read the readings appearing on the amp meter screen. Set an amp on the meter.After a while needle designated to show the amp will point on your set amp. At times some amp meters show two needles, the one which points to your set amp, shows the amp, and the other one shows the battery’s charge.

Reading the Charger

Today, a modern charger with advanced technology comes along with the ammeter. It might be a bit tricky to operate, but the critical book makes it easy. However, this battery charger with digital features will reduce the chance of overcharging, harming the battery, and reducing battery life. It would be best to have your eyes on the scene as all reading results will appear on the screen. Moreover, make sure to turn on the amp button while measuring the current. In the meter, there are two readings mentioned. The percentage charged is the above reading, whereas the bottom reading indicates the charge rate. Percentage charged indicates the percentage of battery. The needle moves from right to left when it is plugged in to charge, whereas the charge rate decreases as no. of amps are reduced when the battery is charged.

Check if the Battery Is Being Charged

The user can get to know if the battery is being charged or not through simple steps. When you connect with the switch and turn on the battery, the needle moves to the right. Whereas after few minutes if the needle starts moving to the left at a gradual pace. This shows your battery is being charged perfectly.

When a Battery Is Fully Charged 

The user can identify by looking at the digital screen when his battery has been fully charged before setting a specific input amp. When the needle crosses half the set amp, it concludes that the battery has been fully charged; taking an example of the user who has set his amp meter at 12 amps, when the needle touches 6 amp, it results in the battery being fully charged.

Difficulties That May Occur While Reading the Battery Charger Meter

It’s a new technology which is efficient but not perfect. At times the needle on the amp meter may fluctuate. It may occur if there is some defect in the battery due to being fully discharged etc. Moreover, needle fluctuation can be another reason for connection issues because terminals are not being appropriately connected.


Despite owning cars and other technologies that run with batteries, many people don’t know how to read battery charger amp meters. Being acknowledged with basic information saves you from more extensive damage. Being aware of reading your battery charger amp meter can be very beneficial even if you don’t charge your car battery by yourself. You can keep an eye on your driver if he’s handling your battery and the charger as per the requirement without harming it unnecessarily.