We offer two different types of batteries. Absorbed Glass Mat (AGM) Sealed Lead Acid (SLA) batteries made from the highest quality virgin lead as well as Lithium Iron Phosphate (LiFePO4) or LFP. The main advantage of LFP batteries is that they do not have the volatile thermal issues that Li-ion batteries have, making LFP batteries much safer then Li-ion. The other advantage is that they have very high cycle life of up to 2000 cycles compared with Sealed Lead Acid (SLA) batteries that have a cycle life of about 400 cycles. However the cost of SLA is much less than LFP and would be a great option for a low cost build.