The Science Behind UPS Battery Technology and How It WorksMAY.23,2023
The Future of Electric Vehicles: Exploring the Role of Lead-Acid BatteriesMAY.23,2023
Anything you want to know about AGM batteriesMAY.22,2023
The Advantages of Using Lead-Acid Batteries in Off-Grid Power SystemsMAY.18,2023
Sustainable Energy Solutions: How Lead-Acid Batteries are Supporting RenewablesMAY.18,2023
Protecting Your Business from Power Outages: How Lead-Acid Batteries Can HelpMAY.17,2023
Revolutionize Your Home’s Energy Efficiency with Lead-Acid BatteriesMAY.11,2023
Maximizing Your Devices’ Battery Life with Lead-Acid BatteriesMAY.10,2023
Lead-Acid Batteries vs. Lithium-Ion Batteries: Which is Better for Your Application?MAY.09,2023
Investing in Lead-Acid Batteries: A Smart Choice for Long-Term Energy SavingsMAY.05,2023
Spaceflight Power Supply Co., Ltd.
Add: Weimin High-Tech Development Area, Fusha, Zhongshan, Guangdong Province, China
When it comes to car problems, nothing is ever convenient. It seems like your vehicle plots the perfect moment to give you grief, and the majority of the time, it involves a dead battery. While it’s true the starter motor, alternator, or spark plugs could be behind your vehicle’s refusal to start, it’s most likely that your battery is zapped. In this article, we’ll cover how to test a car battery, specifically its voltage, and also break down what each reading means.
Diagnosing a car battery is a breeze, but you will need a piece of equipment called a multimeter. These can be picked up for cheap either at your local auto parts store or online, and will quickly tell you whether or not your battery is out of juice. Though you can find analog multimeters, we’d recommend investing in a digital unit so there’s no misinterpreting the readout.
Finding your vehicle’s battery should be a cinch, but some automakers put them in odd places such as the trunk or under the rear seats. The vast majority can be found under the hood however, to the right or left of the engine. You can identify the battery by the positive (red/plus sign) and negative (black/minus sign) terminals that either route to a rectangular housing box or directly to the exposed battery.
Once you’ve located the unit, make sure your vehicle is turned off. If you’re using a digital multimeter, set the dial to DC voltage. Next, take your multimeter’s black lead to the negative battery terminal and the red lead to the positive terminal.
At this point, your multimeter will give a voltage readout. Here are some guidelines:
12.66+ volts 100% charged
12.45 volts 75% charged
12.24 volts 50% charged
12.06 volts 25% charged
11.89 volts 0% charged
If you’re seeing 12.45 volts or higher, your battery is in good shape and it’s time to check other common culprits. If you’re below a 75% charge, your battery might still bring the car to life, but not reliably. Below this threshold, your battery may need recharging or even replacing.
If you struggle with any part of this process, take a trip to your local auto parts store and ask for help. Most shops are happy to help test, remove, recharge, and replace your car’s battery. You get a free hand, and they will (hopefully) earn your business in the future.