How to choose a secondary battery?

Picking a second battery comes down to what you need to power, the space you’ve got, and how you plan to use your setup. Think about all the accessories you want running – fridges, lights, chargers, or maybe a small campsite setup – and how long you’ll be off-grid. Lithium batteries are great for low-maintenance, high-performance setups, while AGM is solid for weekend trips and heavier heat tolerance. And don’t forget: make sure your battery works with a compatible Redarc DC-DC charger to keep everything charging safely and reliably.