Lithium-iron Phosphate (LiFePO4) batteries are a big improvement over Lithium-ion (Tesla technology) and Lead Acid Battery Technology.
LiFePO4 batteries are the safest type of Lithium batteries as they will not overheat into a runaway condition, and even if punctured, it is said they will not catch on fire, they are a safer & more advanced technology than older Lithium-ion (TELSA) battery technology!
All YiY LiFePO4 batteries come with a minimum 3 year warranty based on =3'600 Cycle life at 80% DOD, and up to 6'000 cycle life (15 years) at 60% DOD, depending on usage!