The Enerdrive B-TEC LiFeP04 Lithium batteries have a built-in battery management system and wireless battery monitoring via your smartphone or tablet. The internal battery management system monitors and optimises each cell in the battery and will protect from over charge, over discharge, over temperature and short circuit. The monitoring app allows you to wirelessly monitor battery capacity, battery voltage, battery current, state of charge, temperature and more. There are a number of advantages to lithium batteries over gel, AGM or flooded batteries. They are smaller and lighter, they charge faster and can be used for longer before needing to be recharged and have a longer lifespan. You might go through 3 or 4 lead acid batteries in the same time as a single lithium battery, saving you money over the long term. These batteries are perfect for use in camper trailers, caravans, 4WDs and boats.