I've just ordered a Anker Astro E4 13000mAh Portable Power Bank charging station from amazon, i thought it would be great for charging my phone on the go. But i have one question, i use a huawei mobile wifi hotspot too, will i be able to safely charge this using the anker power bank too? on the listing on amazon it lists all the phones it can charge but nothing else. The hotspot is a 1900mah battery and it says 4.2v right beside that. Would i blow the thing up if i tried charging it this way?