Hi I have a wish to create a bag that is intended for carrying a lithium battery that I can use as replacement for a regular lead car battery. Main reason I want to do this is to get something that is less of a pain to move around. For example power my minnkota electric boat motor, or be used as starthelp when the cold killed my regular car battery. Ofcourse it is no problem to just put some batteries in a bag and have the cells charged separately, but I would like a complete unit that can be handeled like a lead battery. If I could reach anything I was hoping for, the battery should be able to handle charging from a generator in a car or boat if decided to put there. Also be protected from deepdischarging by some circuit. Allow charging with a regular lead battery charger. So basically the circuit of the batteryunit would shield the lithium battery from abuse it wouldnt handle. What technical solutions am I looking at to accomplish something like this? Possible? Thanks.