AGM vs. lithium batteries: Determining the ideal power solution for your needs
Find out which type of battery might be best suited for your favourite activities.
Both AGM and lithium batteries are favoured among those seeking dependable power solutions on the go. But how do you determine which battery type is the right choice for you? Each has their own unique characteristics, but a decision will largely hinge on your specific power requirements and intended activities. Keep reading for a brief overview that can assist you in navigating the differences between these battery types.
What are AGM batteries?
AGM (Absorbent Glass Mat) batteries are a type of lead acid deep cycle battery. They have been around longer than lithium batteries and are named after the fiberglass mat within them that contains a mixture of water and sulfuric acid. Fully contained, AGM batteries can be used in any orientation without risk of spills or leaking.
What are AGM batteries be used for?
AGM batteries are often used for RVs, marine vehicles and as renewable energy systems because of their deep cycle capabilities. They can withstand repeated deep discharges without sustaining damage and are also known for holding their charge for extended periods of time when they are not in use.
What are the limitations of AGM batteries?
The larger weight and size of AGM batteries can limit their usefulness. They’re not ideal for use when a lighter, compact option is needed. Compared to lithium batteries, they also have a more limited cycle life and lower depth of charge at around 50%.
What are lithium batteries?
Lithium batteries are a relatively new type of battery that uses lithium ions to store and release energy. Compared to traditional lead acid deep cycle batteries, the mechanism of these batteries allows them to be constructed at a lighter and more compact size than traditional batteries at comparable power ranges. They also have faster charging capabilities than AGM batteries and maintain their charge for longer when not in use.
What are lithium batteries used for?
Lithium batteries have a wide range of uses and commonly power electric vehicles, RVs, portable electronics, caravans. They can also be used do solar power. When appropriate, they are a preferred choice for many uses due to their lightweight nature, longer cycle life and cost-effectiveness. They tend to be a convenient choice because of their ability to hold more power for their size, fast-charging capabilities and having a higher number of charge-discharge cycles and extended lifespan.
What are the limitations of lithium batteries?
Lithium batteries have additional features like the battery management system (BMS) that ensures their safe operation. With additional technology like this that comes with lithium batteries it is no surprise that they are the more expensive option when it comes to upfront costs when compared to their AGM counterpart.
Should I choose an AGM or lithium battery?
The choice between the two depends on your usage patterns and specific needs.
If you want to mostly power portable electric devices, and you don’t go out very often, then an AGM battery may be a more cost-effective solution. However, if your plans involve extended off-grid periods and frequent usage, a lithium battery might be the more suitable option.
While AGM batteries generally come at a lower initial cost compared to lithium, it’s important to factor in the requirements for deep cycle capabilities. Also, consider size and weight constraints. If space is limited, AGM batteries may not be the optimal choice for your compact setup.
To summarise, both AGM and lithium batteries have their own advantages and disadvantages. AGM batteries are cost-effective for applications requiring deep-cycle capabilities and are not constrained by size and weight. Lithium batteries can provide faster charging, higher energy density and a longer life cycle. For this reason they also tend to cost more upfront compared to their AGM counterparts. Understanding these differences can help you make an informed decision about what you need from a battery.
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Things to note
The information in this article has been prepared for general information purposes only and is not intended as legal advice or specific advice to any particular person. Any advice contained in the document is general advice, not intended as legal advice or professional advice and does not take into account any person’s particular circumstances. Before acting on anything based on this advice you should consider its appropriateness to you, having regard to your objectives and needs.
- Every effort has been made to present accurate data which is obtained from various automobile manufacturers and unpublished information sources. While RACQ believes these information sources to be reliable and have taken reasonable precautions in their compilation, RACQ does not assume responsibility for any inaccuracies. RACQ reserves the right to change specifications without notice
- RACQ will use reasonable endeavors to deliver the battery to you within one hour after you request a mobile battery replacement service. However, there may be circumstances in which it is not possible for RACQ to deliver the battery to you within this timeframe. Including circumstances beyond RACQ’s control, limited battery stock availability and battery stock location.
- RACQ has made all reasonable efforts to ensure the data presented is accurately compiled and is obtained from various reputable and unbiased manufacturers and unpublished information sources.
- RACQ does not assume responsibility for any inaccuracies in the presented information, where it is sourced in the above manner.
- Where a recommendation has been made, that recommendation is made based on the information you provide. RACQ takes no responsibility for any loss you incur from reliance on a recommendation, where that recommendation is based on incorrect information.
- If your vehicle is a “start/stop” vehicle, then the appropriate battery type must be fitted. RACQ only fit EFB and AGM battery types to these vehicles.
- Any recommendation of battery type and price will be subject to final confirmation by the attending RACQ Patrol or by an Approved Battery Stockist; RACQ reserves the right to change recommended specifications based on their assessment.