Need extended training time with your ball machine? Power your play with the Lobster external battery pack, which provides an additional 4-8 hours of court time and works with all of our elite, elite grand, and the pickle by Lobster series machines. BENEFITS & FEATURES: Lobster external battery pack includes a large 18-amp sealed lead-acid battery Battery cord with connector XLR Adapter Standard battery charger Canvas carrying bag with shoulder strap