Ηow to operate it
There are two switches, one "black" is for the voltage meter to see the battery voltage and
the other is the "red" variable power switch. To operate the device and to increase the intensity of the lamp, while increasing the motor speed!
You can use "dimmable" & "low curent" consumption Ε14 Led lamps 1.5watt to 5watt, AC 120v or 220v.
The "blue pcb terminal" is also an "input power" for the charger module to charge the battery.
You can use any DC power like is a "solar panel" with characteristics of 5 volt /1A.
If the device "does not work", you will need to charge it.
Υou do not have to put out the battery and put them in a wrong "polarity" way.
This will "destroy" the battery charging board! There is no reason to remove the battery.
Τhe battery are have big "capacity", So if the battery are discharged "empty",
you will have to wait for "some time" until it recharges.
First charge over 10 hours. This way the battery will be fully activated
NOTE
Maybe there are small differences in electronic components
and materials (like bigger batteries etc) due to device enhancement for the buyer's benefit!