Quick view Wilson Portable Tennis Ball Machine Battery Wilson Portable Tennis Ball Machine Battery Individual Battery Specifications Voltage: 12 Volts Capacity: 12 Amp Hour Chemistry: Sealed Lead Acid Dimensions: L 5.95" x W 3.86" x H 3.94" Terminals: .250" Fast On Tabs *Shipping Premium... MSRP: Was: Now: $49.00 Add to Cart Compare