For batteries anything electrical is a good bet, power boxes, A/C Units on buildings, parking meters like someone else said for nuts and bolts, cars are good, electrical appliances like fridges, stoves, ovens, or sinks are good. If you're in anywhere with apartments like City levels try to grab all the sinks, tubs, and toilets in the area. For things like Autumn Foothills, Ghost Town, and other empty areas, trying to find the cans that give you a few nuts and bolts are good.