People don’t really think about their car battery until it suddenly dies. But choosing the right one actually matters a lot. These days, the big confusion is AGM vs Lithium battery, which one works better for your car, which lasts longer, and what’s worth your money in Australia.
Whether you’re visiting a car workshop in Perth, calling a mobile mechanic Perth, or just checking prices at a car battery repair centre, knowing the difference will save you stress later. This is a blog that gives you a detailed analysis of both the batteries and which one you should consider when.
What Actually Is An AGM Battery?
AGM (Absorbent Glass Mat) batteries are still lead-acid batteries, but the acid is soaked in a glass mat.
This makes them sealed, sturdy, and less likely to spill. A lot of cars use them, especially:
- Stop-start cars
- 4WDs
- Cars with a lot of electronics
- Performance cars
Pros of AGM
- Strong starting power
- Doesn’t leak
- Handles vibration
- Cheaper than lithium
- Works well in cold weather
Cons Of AGM Battery
- Heavy
- Doesn’t last as long as lithium
- Slow to charge
- Loses performance when discharged deeply
Also Read: Reasons Why Your Car Battery Keeps Draining & How To Stop It?
What Is A Lithium Battery?
Lithium batteries (usually LiFePO4) are more modern and honestly feel like the “premium” option. They are lighter, faster, and last much longer.
Pros of Lithium
- Very lightweight
- Charges really fast
- Can last up to 10 years
- More usable capacity
- Efficient even after deep discharge
Cons Of Lithium Car Battery
- Expensive
- Not made for every car
- Needs a compatible charging system
AGM Vs Lithium Battery: Principal Differences
This is what really counts on the selection.
1. Weight
- Lithium is much lighter and does not drag down the car as much that small cars have.
- AGM is dense due to its still being lead-acid and it is quite a challenge to take the weight out.
2. How Long They Last
- AGM: around 3–5 years.
- Lithium: around 8–10 years.
The obvious winner in this is lithium, not to mention that you do not have to spend the time replacing the device after every few years.
3. Charging Time
- Lithium is charged at a higher rate – 4-5 times higher. This is beneficial to those that drive every day and do not require a long charging duration.
- AGM is slow and requires an appropriate load on the alternator.
4. Temperature Performance
- AGM works better in the cold and works fine even in cold mornings.
- Lithium does not like freezing weather except when it has an inbuilt heater and there are instances that its performance decreases in case it is too cold.
5. Price
- AGM is less expensive at the start, thus, it suits individuals with limited finances.
- Lithium would be costly initially but less expensive in the long run as you do not have to replace it frequently.
6. Car Compatibility
- Cars that lack management of batteries and old cars typically are not able to take lithium.
- AGM operates nearly anywhere without theatrics and does not disorganize the electronics in the car
AGM Vs Lithium Battery: What’s Better For You?
There’s no one answer — depends on your car, budget, and what you expect.
Pick AGM If:
- Don’t want to spend too much
- You drive a normal petrol/diesel car
- You want something reliable in cold weather
- Your car doesn’t support lithium
- You have a stop-start system
Pick Lithium If:
- Want it to last many years
- Using heavy electronics
- Want fast charging
- You want something lightweight
- You go camping, 4WD, or long road trips
AGM Vs Lithium Battery: Installation Steps
These are basically the steps most mechanic shops, auto repair shops in Perth, or mobile car service Perth follow.
Step 1: Battery Inspection
Check the old battery, test voltage, look for rust or corrosion.
Step 2: Safety Gear
Gloves, safety glasses, tools — basic stuff.
Step 3: Disconnect Old Battery
Take out the negative terminal first, then positive.
Important so you don’t short something.
Step 4: Remove Battery
Lift it out carefully. AGM is heavy; lithium is not.
Step 5: Clean the Tray
Remove dirt and corrosion. Check cable ends.
Step 6: Put New Battery In
Place your AGM or lithium securely.
Step 7: Reconnect Terminals
Positive goes first, negative last.
Step 8: Reset the Car System
Some cars need ECU resets or battery registration.
Step 9: Final Test
Check voltage, alternator, and charging.
Car Battery Service & Replacement in Perth
If you need car battery replacement Perth, or even a 24 hour mobile mechanic, we offer:
- Battery jumpstart
- Fitting and installation
- Full car inspection
- Old Car battery service & repair
- Charging system check
- Car Battery Replacement Cost Complete Quotation
You’ll also get guidance on best car battery brands depending on your vehicle and budget.
Conclusion
Picking a battery between lithium and AGM can depend on what your priorities are. AGM is definitely cheaper and works fine most of the time in Australia. But if you want a battery that stays for a longer time, you can go for an AGM. If you are still confused, contact our expert team of car mechanics in Perth and get complete guidance.
FAQs
1. Which battery lasts longer?
Answer: 1
Lithium lasts way longer — around 8–10 years.
2. Can I replace AGM with lithium?
Answer: 2
Only if your car supports it. Some cars don’t.
3. Is lithium worth the extra money?
Answer: 3
Yes if you want long life and fast charging. No if you just want something cheap.
4. Is AGM good for Australian weather?
Answer: 4
Yes, AGM handles heat and cold well.
5. How much does car battery service cost in Perth?
Answer: 5
Roughly $150–$500 depending on battery type and labour.
6. Who installs these batteries?
Answer: 6
Most auto repair shops, car workshops, and mobile mechanics in Perth install both types.
