The can also be a protable power supply for Raspberry Pi and Arduino.Supports Smart phones, Tablets, and Other Portable Devices (Charge 2 tablets or 4 smartphones simultaneously)With 4 USB outputs, the Powerx4 is capable of charging any of your popular high drain mobile devices such as: Apple phones & tablets Android or Windows smart phones Android Tablets (Samsung, Acer, or more) PSP, MP3 Players, Portable Game Devices, and More Product Highlights: High Capacity Lithium Polymer Battery: 18,000mAh Pre-charged and ready to use Up to 85 hours extra talk and play time Four USB output ports: 2A output x 2; 1A output x2 Optimized to quickly charge the latest Apple, Android or Windows devices. Charge 4 devices at once (2 tablets or 4 smart phones) LCD screen battery indicator Up-to 3 months super long stand-by time High Performance Li-ion battery with 500+ life cycles Specifications: Battery Type: Li-Polymer Capacity:18,000mAh Input: DC 5V 1.5A Output: 2 x DC 5V 2A; 2 x DC 5V 1A Combined Max. Output: 4A (2 tablets or 4 smart phones) Dimension: 139 x 67 x 28 mm Weight: 1lb 0.5oz Retail Package Includes: Tenergy POWERx4 Power Bank Micro USB cable User Manual *Tenergy product is a generic replacement, not the original OEM battery. *iPad®, iPad Mini®, iPhone® are trademarks of Apple®. *PSP®, Sony® are trademarks of Sony®.*Acer® is trademarks of Acer®. *Samsung® is trademarks of Samsung®. *Tenergy is not associated with Apple®, Sony®, Acer®, Samsung®. *Tenergy product is not subject to any warranty by Apple®, Sony®, Acer®, Samsung®. *Packaging images may vary from actual products. Phone and Tablets are not included.