External accumulators with print (power-banks) – external accumulators are one of new advertizing souvenirs. If you have a desire to give rather necessary souvenir which will be often used external accumulators are for you. This type of a souvenir differs not only wit the design, also they have a different power. Depending on power, it is possible to learn how many exercises can be done with it. Having received pover-bank, your clients will precisely estimate it and will remember you, loading the gadgets. Pover-banks most often give to partners or main clients. For print on these souvenirs, we use an engraving or screen print.