With the hot selling of our square shape Solar Power Bank Extra T4, we have designed the round shape solar power bank i.e. Extra T4B for more choice of our customers. It has the same function of the Extra T4, but with the round shape and the 1700 mAh capacity.  Meanwhile, the capacity of Extra T4 has been updated from 1400mAH to 2000mAh. 

Extra T4 and Extra T4B are not only the solar power bank which could be stuck on the car window or house window for easy use, but also the normal power bank which could be charged by USB.  For the enquiry or any question, please feel free to contact us by sales@iseeaccessory.com