I was befuddled by my choices of a leisure battery to install in my camper. The following might help you with your choice.
There are two broad type of technology – lead acid and lithium.
Based on what I have read if you are going to choose a lead acid battery you need to choose an AGM (Absorbent Glass Mat) style. These are resistant to vibration, totally sealed, non-spillable and maintenance-free and apparently are the most popular style in Australia.
|Feature||AGM Lead Acid||Lithium|
eg. 110 AH
~31 Kg (apparently minimum weight for quality)
|Lighter – Better
~11Kg for Baintech Slimline Made in Australia
|Size||Bigger||Smaller – Better|
|Effective to discharge level||50%||80% – Better|
|Recharge time||Slow||Faster – Better|
|Lifespan||Shorter ? 3-5 years||Longer ? 10 years – Better|
|Cost||Cheaper – Better||Expensive|
The value equation will need to include what other changes you need to support the battery such as whether you are going to use a solar regulator and the cost of this associated equipment.
There are downsides of a lithium battery including that they are not a simple replacement for an existing lead acid battery. The existing charging system may not be compatible and lithium batteries need to have a smart management system (which might be internal). Don’t assume all sellers understand the requirements. [ Reference: RV Daily ]
My plan is to get equip a solar regulator just in case.
I hope that I will not ever need to use a solar panel though as I am thinking with a “stronger” alternator I am hoping that my battery will be charged in transit and the trick will be to choose a battery that will last up to two days. It is hard to imagine I would ever free camp longer than that. If this changes though I am hoping that a portable panel will suffice – I don’t really want to put one on the roof of the camper.
Now choosing which Lithium battery is another issue.
More to come on that.