[werk_ag]

• Concept for 5V systems
  • At the moment the voltage is stepped down from the 2s connection but batteries do not charge when the charger is supplied with 5 volts.
    
  •  The new idea is to change the batteries to parallel Connection - so we would only another protection device in this case and a switch for the connection change but the rest could stay the same
    

Regards, engolling

My wish list:
Input voltage between 9V and 13.8V (or even higher)
Output Voltage, adjustable between 5V and 12V (or near Input Voltage if higher), 2Amps.
That would be an almost universal UPS, usable for a large range of electronic devices, including the WeatherDuinos.