Depending on the weather conditions and the region where you live, it can be more difficult to fully charge your WakaWaka. It is important to put the solar panel face to direct sunlight and without anything blocking it. Try to turn the solar panel along with the sun during the day so it will always face it.
Keep in mind that the further you are from the equator, the longer it will take to fully charge the WakaWaka via the sun. Hence, it requires some patience to charge it via the sun in Europe.
If you put your WakaWaka behind a glass, it will lower the charge efficiency drastically.
You can tell it is charging from the sun when the single light on the top blinks (WakaWaka Light & Power+). A single blink means that your WakaWaka is charging slowly (but surely), two consecutive blinks means it is charging faster already and three means it is charging optimally. If it blinks 8 times in a row, it means that it is fully charged.
You can place the solar panel towards the sun or hold it under a strong lamp to check if the light is blinking and functioning properly.
If you think your WakaWaka is defect, please send us an email at support@waka-waka.com mentioning the name of the product, the (approximate) date of purchase, the type of defect and the country where you live.