I have other batteries like these, from Monoprice, that I've been using for a few years. These are not only a little more powerful, but I can use them in places where they are charging while running other things. I have a small solor system that keeps a 12v battery topped off and the 12v battery with a 12to5v adapter is keeping one of these charged while it keeps a few 5volt LED lights going 24 hours a day. I am going to rest running a WyzeCam on these as well. Oh, they are also great to have around to top off cell phones and other devices. :-)
Love this charger. Lasts a long time. Can charge my Samsung Note 8 up to 8 times. Would definitely but again. Only thing I do not like is how long it takes to change the power bank its self. Over 12 hours, but still worth the money.