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About Our Car Battery
Your car’s battery powers you car start and stop system. With flooded lead‑acid and AGM options on the market, choosing the right one can be confusing. This guide breaks down battery types, explains how to check voltage, and shows why cold‑cranking amps (CCA) are vital—so you pick the perfect replacement and never get stranded.
Car Battery Type
When it comes to automotive starter batteries, there are two main types you’ll find on the market today. One is the flooded lead-acid battery, it’s the traditional car battery type that’s been around for decades. It uses a mix of lead plates and liquid sulfuric acid to store and release electrical energy. It requires occasional maintenance, you may need to top off the electrolyte with distilled water.
And another one is the AGM maintenance-free car battery. AGM batteries use a fiberglass mat to hold the electrolyte in place, making them fully sealed and maintenance-free. It’s sealed, spill-proof, and vibration-resistant. It suits for modern vehicles with start-stop systems, luxury cars, trucks, SUVs, or anyone driving in harsh climates (especially cold weather).
Which Size of Car Battery Should I Buy?
Since car batteries come in many different sizes and types, when you buy a new car battery, make sure you choose the one that matches your vehicle perfectly. At uplus battery, mainly AGM car batteries, common group size models and applicable models are:
- H5 Group 47 Car Battery: Fits many vehicles from Buick, Chevrolet, Fiat, Volkswagen and more. Click for more applicable models>>
- H6 Group 48 Car Battery: Fits many vehicles from Audi, BMW, Buick, Cadillac, Chevrolet, GMC, Jeep, Mercedes-Benz, Mini, Volkswagen, Volvo… Click for more applicable models>>
- H7 Group 94R Car Battery: Fits many vehicles from Audi, Acura, BMW… Click for more applicable models>>
- H8 Group 49 Car Battery: Fits many vehicles from Audi, BMW, Hyundai, Mercedes-Benz… Click for more applicable models>>
- H4 Group 140R Car Battery: Fits many vehicles from Mazda, Lexus, Hyundai, Chevrolet… Click for more applicable models>>
- Group 24/34 Car Battery: Fits many vehicles from Chrysler, Dodge, Pontiac… Click for more applicable models>>
If you don't know which group size your battery fits, there are other resources that can help you choose the right battery, including the owner's manual, Uplus battery find battery size system (Click to Match Models), in-store guides, or contact uplus online support directly via support@uplusbattery.com.
If you have purchased a used vehicle, don’t take for granted that it has the right battery installed. Be sure to consult other resources to determine the correct type of battery.
How to Test Your Car Battery?
Keeping an eye on your car battery’s health is key to avoiding unexpected breakdowns — especially when the weather turns cold. The two most important factors to check are Voltage and Cold Cranking Amps (CCA). Here’s how to test both like a pro:
1. Test Battery Voltage
Why it Matters:
Voltage indicates the battery’s current state of charge. A low reading might mean your battery needs charging or is starting to fail.
How to check it:
- Turn off your car and all electronics. Wait at least 2 hours after shutting the engine off for the most accurate reading.
- Use a digital multimeter. Connect the red (positive) lead to the battery’s positive terminal and the black (negative) lead to the negative terminal.
- Set the multimeter to DC volts and take the reading.
What do The Voltage Readings Represent?
| Battery Voltage | Battery Condition |
|---|---|
| 12.6V – 12.7V | Fully Charged |
| 12.4V – 12.5V | Good |
| 12.0V – 12.3V | Low — consider charging |
| Below 12.0V | Very low — maybe it needs replacement |
2. When Buying a New Battery — Pay Attention to CCA
CCA measures how much power your battery can deliver to start your engine in cold weather — when batteries are under the most strain. A higher CCA rating means better cold-starting reliability, especially in winter or if you have a large engine.
If you live in colder states (like Michigan, Colorado, or upstate New York), opt for a battery with a higher CCA to avoid winter no-starts. Modern AGM (Absorbent Glass Mat) batteries typically offer higher CCA values along with better vibration resistance and longer lifespan.
Example:
If your owner’s manual calls for a 600 CCA battery, don’t buy one with 450 CCA just to save a few bucks. Go for 600 CCA or higher for peace of mind. Many U.S. drivers upgrading to AGM batteries appreciate the extra cold-start power and maintenance-free design.
Common Questions U.S. Drivers Ask
-
Is an AGM battery better than a regular lead-acid battery?
Yes — if you want better performance, longer life, and zero maintenance. Especially valuable for modern cars or tough weather. -
How can I tell if I have an AGM battery?
Check your battery label — it should clearly say "AGM" or "Absorbent Glass Mat." You can also check your owner’s manual or battery spec sheet. -
Can I replace a regular battery with an AGM?
In most cases, yes — as long as the size, voltage, and terminal layout match. -
Are AGM batteries worth the extra cost?
If you drive a vehicle with start-stop technology, or want longer-lasting, hassle-free power, or a completely maintenance-free and long lifespan, it's definitely worth it!
In conclusion, picking the right battery means balancing cost, maintenance, and performance.
About Uplus Battery
Uplus Battery, the subsidiary of Leoch battery and a renowned international brand. Specializing in high-performance, maintenance-free AGM batteries. With more than 20 years of R&D experience and a global distribution network, Uplus provides reliable AGM power solutions for vehicles of all types—from cars and trucks to powersports (motorcycles/ATV/UTV), boats, and industrial applications.
Uplus battery AGM (Absorbent Glass Mat) batteries are known for their excellent start-stop performance, vibration resistance, and long service life. Unlike traditional flooded lead-acid batteries, Uplus AGM batteries are completely sealed, spill-proof, and require no maintenance.
