It is foldable and easy to use.

Specifications:

Solar panel:  30W 

Voltage:15V,2A

built-in Battery type: lithium Battery

Rated Output: 12V,16V,19V,;    USB out:5V/700mA

Charging time: 6 hours

Features:

(1) Battery capacity : 20000mAh,  is 4 - 30 times of digital batteries.

(2)When the solar charger's in-built recharged battery is fully recharged,it'll turn itself off automatically,thus saving the electricity.

(3) 8-point power indicator, low voltage alarming warning.

(4) Prolong the operation time of laptop by 3-6 hours.

(5)suitable for most of the digital products in the market.

(6) safety design, intelligent circuit protection.

(7)compatible with 14V-24V adaptors, can recharge and discharge synchronously.

(8) Automatic voltage regulation.