Max 1A programmable linear charging current for single 3.7V Li-ion battery, full 4.2V. Constant current/constant voltage charging with over-temperature protection. Startable to limit inrush current, with battery reverse connection protection, low power standby, extend battery life. Charging status dual output, no battery and fault status display, 0V activation, 2.9V trickle charge, working temperature -40~80. Input voltage range 4.2V ~ 6.5V, output voltage 4.2V -28V adjustable, maximum power 5W