The custom power bank charging gift sets is our NEW model in 2017 of fashionable ultra slim design.The promotional personalized slim power bank chargers are made of abs,plastic finish in the colours of white,yellow,red,black,blue,orange,green...or custom pantone colours of capacity 4000mAh.With an accessories of lanyard attached to the bespoke slim powerbank emergency battery chargers,it is very convenience.Personalizing the company brand,slogan,message,label,and contact information on the surface of custom portable mobile power bank universal back up battery chargers by silk,digital colour,UV,or pad printing...