Oster Power Pro Ultra Replacement Battery
Replacement/Accessory Battery for Power Pro Ultra Cordless Clippers.  Compatible with Oster clipper models 78400-020, 78400-030, 78400-040, 78400-850. Also compatible with previous Oster Power Pro Clipper models 7840-013, 78400-013. Requires Oster Power Pro Ultra Charging Stand model 78400-100, not included.