What batteries are commonly used for solar street lamps? Which battery is used more?

1) LiFePO4 (Lithium iron phosphate ) Battery: small size, high temperature resistance, deep discharge, long lifespan, safe, pollution-free, expensive.
2) Li-ion lithium battery: small size, low temperature resistance, high energy density, deep discharge, long lifespan, environmental-friendly, pollution-free, expensive.
3) Gel battery: low price, suitable for low temperature high rate discharge; Sealing maintenance-free; But pay attention to prevent lead acid pollution, and if too heavy, it will be phased out.
The most popular battery is lithium iron phosphate battery, which accounts for more than 60 percent of the current solar street lighting system market.