Custom Lithium 310Ah NextGen Ultra Slim Lithium Battery
This is an estimate only. Actual delivery times can vary with stock availability, courier delays, weather, public holidays and your location.
Big Battery Power In A Small Package - The Custom Lithium 310Ah NextGen Ultra Slim Packs A Punch
Running out of space but still need serious juice? This next-gen 310Ah Ultra Slim Lithium Battery is an absolute ripper for utes, canopies, and tight installs where every millimetre counts. Don’t let the slim profile fool you, these batteries packs a punch, with enough grunt to run fridges, lights, and even a decent inverter without breaking a sweat. Built tough, built smart, and built right here in Oz.
Power up your next adventure with the Custom Lithium 310Ah NextGen Ultra Slim Battery, big capacity, slim design, and reliable Aussie-built performance. Get yours today and enjoy serious power without sacrificing valuable space.
Add one to your cart today and stay out longer.

Why The Custom Lithium 310Ah NextGen Ultra Slim Lithium Battery May Be Right For You:
- Don't stress about your battery whilst you're driving through those bumpy outback roads. Safety is Custom Lithium's number 1 priority. The 310Ah Ultra Slim Lithium Battery is integrated with A-grade automotive LiFePO4 lithium cells meaning you can rest assured that your battery will be fine, even if your tires are getting a working over.
- Big bulky batteries are a thing of the past, ultra Slim batteries are gaining in popularity, and for good reason! The sleek design of Custom Lithium's Ultra Slim batteries allows them to fit into your caravan, 4x4s and boats seamlessly. Light, slim but powerful, the ultra slim battery is a great alternative for when you're short on space.
- Worried about your battery sliding all over the place? Worry no more as mounting Side Rails are included in this package. Simply mount your new ultra slim battery inside of your caravan, 4-wheel drive or boat to keep your battery intact.
- Great for powering your Star link connections, 240V inverters, your fridges, induction cookers, air compressions, computers, cameras, lights and much more.
- Custom Lithium stand by their products because they know that they are of high quality. That's why each purchase of one of their batteries comes with a 7 year warranty! Every single battery is individually bench-tested, so you know that you're getting a quality product.
- Your battery ain't taking a battering. All components of the battery are insulated against vibration meaning those bumpy roads won't damage your battery.
- Worry less about overheating and short-circuiting. Custom Lithium Batteries are equipped with BMS protection to ensure that your battery maintains performance throughout your journey.
- You're supporting the local economy by buying local. All Custom Lithium Batteries are made here in Australia.
Custom Lithium 310Ah NextGen Ultra Slim Lithium Battery Installation:
If you are unsure about installation, please contact us on 1300 902 361 for assistance, or alternatively please reach out for us to organise an installation.
*Improper installation will void your warranty and may result in injury.

Custom Lithium 310Ah NextGen Ultra Slim Lithium Battery Tech Specs
Custom Lithium 310Ah NextGen Ultra Slim Lithium Battery FAQs
1. What can the 310Ah Next Generation Ultra Slim Lithium Battery be used for?
The 310Ah battery is designed for caravans, 4WDs, canopies, boats, and off-grid setups. It can power appliances and equipment such as fridges, inverters, induction cookers, Starlink, lights, computers, and air compressors.
2. Does the 310Ah Ultra Slim Lithium Battery require assembly or professional installation?
The battery comes with mounting side rails to make installation easier. For safe and reliable operation, installation by a qualified auto electrician is recommended.
3. What safety features does the 310Ah lithium battery have?
It uses premium A-grade automotive LiFePO4 cells and features a Battery Management System (BMS) with an active balancer. The BMS helps protect the battery against conditions such as overheating and over-discharge while supporting balanced cell performance.
4. What warranty is included with the 310Ah Next Generation Ultra Slim Lithium Battery?
The battery is backed by a 7-year warranty, providing added confidence in its build quality, reliability, and long-term performance.