Charging: Linear charge

Input interface: Mini USB

Charging current: 1A (Adjustable, requires resistor change)

Input voltage: DC 4.5V-5.5V...

The solar cells are encased and protected by a durable outer poly frame.

Low cost 5V 0.8W/ 160mA solar cell (HCPOWE0005). Encased and protected by a durable outer poly frame. Copper terminals/pads are provided on the reverse side to allow positive and negative wires to be soldered directly onto the cell. 

1. PFM control DC/DC boost

2. Input 0.9-5v dc, output 5v dc

This XL6009 DC-DC boost/step-up converter module (HCMODU0091) is based on the XLSemi XL6009 DC-DC converter and is capable of boosting a wide range of input voltages up to a maximum of 45V. It output can supply up to 2.5A out current (dependent on input voltage and operating environment) and has built in thermal limiting protection circuitry...

This DC to DC Step-Down Adjustable Power Supply Module is based on the LM2596 switching regulator...