These components can be purchased now at BatterySpace.com and BestekDirect.com. The complete battery system includes a battery pack, battery charger and a 500 watt power inverter. Running time for the full Spark PA system is 2 to 5 hours depending on how many speakers used and additional outboard gear. The battery is airline safe Nickel Metal Hydride (NiMH) at 12v 10ah. The battery with the cigarette socket is model number BL-HD10R2T at Battery Space. The charger with the cigarette socket is CH-UN180CP at Battery Space. The Bestek 500 Watt Pure Sine Wave Inverter model number MRIHL-5011BU-GY can be found at BestekDirect.com or other outlets such as Home Depot and Amazon. The Bestek inverter can also be used with most two terminal 12 volt batteries. The best choices are deep cycle batteries used in recreational vehicles and golf carts. These batteries can be had at a lower cost and longer run times.