1、EFFICIENT SOLAR POWER CONVERSION: This charger enables the conversion of solar panel or photovoltaic device power into rechargeable batteries, ensuring efficient utilization of solar energy. 2、EASY TO USE: Simply insert the solar panel into one side of the solar charger and connect the battery to the other side to start the charging process. 3、MPPT FUNCTION: Equipped with MPPT function, this battery charge control module ensures optimal power generation from the solar panel and comprehensive charging management for single cell lithium battery. 4、CHARGING MANAGEMENT: The constant current charging current can be set using an external resistor, the trickle charging is used for batteries with deep discharge. 5、HIGH PERFORMANCE: With a charging current of up to 2A, a PWM switch frequency of 300KHz, and a constant voltage charging voltage of 4.2V±1%, this charger offers high performance charging.