The Adafruit Universal USB / DC / Solar Lithium Ion/Polymer Charger can use USB, DC or Solar power, with a wide 5-10V input voltage range
Features:
3.7V/4.2V Lithium Ion or Lithium Polymer battery charger
Charge with 5-10V DC, USB or 6-10V solar panel, can have both USB and DC plugged in at the same time, higher voltage source will be used.
Automatic charging current tracking for high efficiency use of any wattage solar panel
Use any 6-10V solar panel
Two color indicator LEDs - Power good and Charging
Set for 1000mA max charge rate, can be adjusted to 500mA or 1.5A by soldering closed a jumper
Will always draw the most current possible from a solar cell - up to the max charge rate!
Smart load sharing automatically uses the input power when available, to keep battery from constantly charging/discharging, up to 1.5A draw. Load output is regulated to no-more-than 4.4V
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