Thank you for bringing this issue to our attention via the community.
Please note that the B1374 you bought is a combo. It included the PowerCore+ 26800 battery (A13740 ) and PowerPort+ 1 with Quick Charge 3.0 wall charger (https://www.anker.com/products/variant/powerport-1-with-quick-charge-3-0/A2013115 ). Rest assured that the battery and wall charger you received are correct.
The size of the powercore+ 26800 is 166*80*23mm (6.5*3.1*0.9 inch) and weight is 0.86b (390g). We noticed that these specifications we listed in our website for A1374 and B1374 are different, we will forward this issue to our workmate to correct all the information. Thanks for bringing it to our attention.
Thanks for your support to us. Have a nice day.