Batteries contain electrochemical cells, and convert that stored chemical energy into electrical energy. Battery Packs use groups of batteries to power the entertainment industry in Los Angeles. Film, digital, lighting, television, video and still photography industries all require battery power. Certain types of batteries, like those with lithium technology, can power products with longer run times than traditional batteries, making them more desirable for filming. Batteries and battery packs all use special chargers and charging equipment to maintain the readiness of this specialty equipment.