1、 Features: Input voltage: DC5V ~ 15V wide voltage input, compatible with cn3791 MPPT solar charger input voltage preselection, solar panel 6V / 9V / 12V can directly charge a single lithium battery. Output voltage: nominal 3.7V full junction voltage 4.2V lithium battery single string lithium battery charging management Interface: sip2.54-2p/2edgk3.81-2p and sip2.54-2p/2edgk3.81-2p are optional Description: complete charge management for single lithium battery Charging current up to 3A (need to change resistance and add heat sink, default 1.2amax) PWM switching frequency: 300kHz Constant voltage charging voltage: 4.2V ± 1% Constant current charging current is set by external resistance Trickle charging of deep discharge battery Automatic recharging function State of charge and end of charge indication Soft start function Over voltage protection of battery terminal Working environment temperature: - 40 ℃ to + 85 ℃