Charging dead battery on Ford E350

CodyClassB wrote:
Thank you all. I learned my lesson. I recharged the dead battery using the method mentioned above (jump started and recharge) . I also also install the Terminal Quick Disconnect Switch

Is that the one from HF, if so that green knob on mine loosed up and caused arching, the black burned contacts left me with a no start situation twice before I finally remove it. Now I just disconnect the neg terminal when in storage. As others have said there is a parasitic load, mine is about .4 amps which will drain your battery. I charged mine in Oct and disconnected after almost 6 months it is still at 80% SOC.