Battery Chargers, Jump Leads And Power Packs. Streetwize Available here. We have a broad selection of battery chargers, jump leads and power packs to prepare you for a number of roadside mishaps. These range from familiar red and black crocodile clip jump lead cables to sophisticated power pack devices with independent power sources and electrical diagnostic capabilities. If you don't drive daily, you might also be interested in a solar battery maintainer to keep your automotive and nautical batteries from discharging during periods of rest. A reliable source of electricity is the key to starting your vehicle. Our battery chargers, jump leads and power packs secure the ability to ignite your engine whenever you want, regardless of the status of your battery.