The solar energy charger absorbs solar energy through solar energy panel on the bag and turns it into electric energy, which is then stored in storage battery. It can charge for digital equipments, mobile phones and notebooks at all brands. It is suitable to be used when there is no electricity outdoors. This product is easy to operate, safe to use, convenient to carry and fashionable. It is ideal for living and traveling. Should you have any interest, please contact us for further product information. Thank you.