The vast majority of power stations today are based on lithium ion batteries, but not all lithium ion batteries are the same. Two popular chemistries today are Lithium Nickel Manganese Cobalt (NMC) or Lithium Iron Phosphate (LFP). NMC batteries' main advantage is energy density, which means they can pack more into a smaller size. LFP batteries' main advantage is in cost (although NMC can also be lower cost), but also lifespan. For example, EcoFlow’s original NMC-based Delta was rated for 800 full power cycles before capacity would drop to 60 percent. EcoFlow’s new LFP-based Delta 2 is rated for 3,000 full cycles before capacity drops to 80 percent. That’s a huge difference, but it may be a little overkill depending on your use case. Since most power stations sit on a shelf 95 percent of the time, the average use during emergencies or camping trips is likely to keep an NMC battery lasting for years and years of service. Those who use a battery in a full-time off-the-grid situation, however, will likely want as many full cycles as possible, which a properly built LFP battery can provide.