Intenso POWERBANK S5000 Manual page 15

 With Powerbank you can charge two devices contemporaneously, for ex.
a tablet at the USB A entry and a smartphone by the integrated cable
with the micro-USB plug.
 Of course, you can also use your own USB charging cable to connect the
Powerbank with your device. Please note, however, that devices can be
charged only through the USB A port of the Powerbank.
 If a device is charged with the Powerbank and the Powerbank has almost
reached its capacity limits, this is signalled by flashing of the last status
LED. Please charge the Powerbank again.
 Please note that, when charging a device with a Powerbank nearly 30% of
total capacity is consumed by the charging process alone. This is caused
for example by the loss of power from circuit heat and voltage
conversion.
 For optimal performance, the Powerbank must be used regularly. If this is
not the case, fully charge the Powerbank at least every three months.
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