If I obtain a car battery, is it possible to use it as an independent elecrical generator/source tow hich I could connect other appliance such as heat lamps for growing weed outdoors. If this doesn't work, does anybody know other objects that could be used as electrical sources

yes it can be done i dont kno ....google it

you can you just have to hook the battery up in a circut so that the power runs from the battery to the appliance then back to the battery agian

well first of all u'll need to either find an ac converter or find appliances that run on dc.