A police probe is underway into the theft of a device used to power electric fencing around a field in Bradwell.
The energiser was taken from Gore Lane between 7.30am and 6.30pm on Monday, June 8.
The unit is blue in colour, with yellow lettering on it.
Police officers investigating the theft want to hear from anyone who saw anyone acting suspicious on the footpath close to the field.
Anyone with information should call PC Gary Ferguson at Derbyshire Police on 101, quoting crime number 24083, or Crimestoppers can be contacted on 0800 555 111.