Slim power bank 4000 mAh credit card size mini portable charger soft touch
Super slim power bank with polymer 4000mAh battery
Features

• Battery UL approval
• Design patent 
• Private tooling family series (2500 / 4000 / 5000 / 6000 / 10000 mAh)
• Super slim only 10.1mm
• Dual USB port Blade power bank 
• PCBA designed by Esorun
• Overcharge / discharge / voltage / current / short circuit protection  
• Iron-man LED Indicators

Specification

• Cell Type: Li-Polymer (Cell UL approval)
• Capacity: 4000mAh
• Input: DC 5V / 1A
• Output: DC 5V / 1A
• Input Charging Time: 4.5-5hours
• Size: 125.8 x 65 x 9.6 mm
• Weight: 108.3g
• Efficiency: >85% full times
• Colors: White-black, white-blue, white-gray, black-black
• Certificates: CE, FCC, RoHS, MSDS, UN38.3