I was thinking of getting one till I read the one I wanted took 8 hours in the sun just to charge the solar chargers built in battery - which then needed to be plugged into the phone for 1 hour which would give about 10% extra to your battery (im guessing if you left it plugged in longer it would charge more - hopefully lol else perhaps the solar chargers built in battery is already depleted - I wasnt sure so never bought one)
