If you're still running an AGM battery in your 4WD, caravan or solar setup, this isn't a criticism - it's an invitation. Because once you understand what you've been missing, there's no going back.
The weight difference alone changes everything
A standard 100Ah AGM battery weighs around 28–30kg. A Custom Lithium 100Ah LiFePO4 battery weighs approximately 11kg. That's less than half the weight - for the same usable capacity on paper, and significantly more usable capacity in practice. That weight saving is real payload. It's gear, water, tools, comfort. And that compounds when you talk 400Ah capacity or more!
Usable capacity - the number nobody talks about
Here's what the battery industry doesn't make obvious: AGM batteries should only be discharged to around 50% of their rated capacity without causing long-term damage. So your 100Ah AGM is really a 50Ah battery in practical terms. A LiFePO4 battery can be safely discharged to 80-90%+ of its rated capacity. Your 100Ah Custom Lithium battery genuinely gives you 100Ah of usable power.
That's not a small difference. That's double the usable energy from a battery that weighs half as much.
Cycle life - the long game
A quality AGM battery might give you 300–500 charge cycles before significant degradation. The smaller Custom Lithium LiFePO4 batteries are rated for over 3,500 cycles, while the larger can be upwards of 8,000 cycles. At one charge per day in a regular touring setup, that's the difference between replacing your battery every couple of years versus having a battery that outlasts most of the vehicles it's installed in.
Why Custom Lithium specifically
Not all lithium batteries are created equal. Custom Lithium batteries are proudly Australian-made and owned - designed and built to handle Australian conditions. Our high-current BMS (Battery Management System) protects your battery against overcharge, over-discharge and extreme temperatures. Our active balancer keeps your cells performing evenly over time, extending the life of the pack well beyond what cheaper imported alternatives can deliver.
When you buy Custom Lithium, you're buying a battery that was engineered for the roads you actually drive, the temperatures you actually camp in, and the adventures you actually take.
The switch from AGM to lithium is the single biggest upgrade most 4WD and caravan setups can make. And there's only one lithium battery worth putting your name on.