So for charging my batteries, for now I just went with one of those single bay rcgeek type chargers. Ya know the white ones that can connect together to form a ghetto fab dji 3 bay spark charger. Anyway it came with a usb input and dc, and I would like to use a dc adapter just since the connector is a bit more durable. Problem is I can't seem to find many dc chargers or wall warts that output 13.1v, as requested for the dc input voltage. For some reason however the charger says "usb input voltage 12v 1.5amp", which has me wondering if I can use a dc adapter I already have on hand that outputs 12v 2amp. I think the answer is no but my electrical knowledge is fairly limited, so I may be missing something here. And if 13.1v is a common dc output could anyone give me hints on which boxed up electronics I should be going through? I mean all the old routers, cordless phones etc I must have 20 of those wall warts around the house. One has to fit right?