High quality 18650 lithium batteries, Charge and discharge over 700 times which is 2 times more than ordinary battery. Intelligent current control: when phone power is low, the current will be adjusted to large. when phone power is sufficient , the current will be adjusted to small, Big capacity ,2.1A fast charging ,easy and safe. Selected material ,colorful case, ABS heat-resistant fire prevention materials. Super compatible with the market 99.9 percent of smartphones, tablets, i-Phone, MP3 / 4, PSP, GPS and other digital devices.Multiple protection to ensure safe working, Effectively prevent overcharge, over discharge, over voltage, over current, over power, overheating, short-circuit etc.Technical Specification:

• Batteries Type: Quality lithium battery
• Capacity batteries: 13000MAH/3.7V
• Operating temperature: 5 ° C-45 ° C
• Material: ABS heat-resistant fire prevention materials
• Switch mode: Button
• Input: DC5V-1A
• Output1: DC5V / 1A
• Output2: DC5V / 2.1A
• Conversion efficiency: 91%
• Charge and discharge cycle:> 700
• Intelligent LCD power indicator: Yes
• Lighting: Yes