Perform the following steps (for example on Nokia E71, E66 or E63 device):

  1. Select Menu key.
  2. Select Installations.
  3. Select Email.
  4. Select Settings
  5. Select When to sync.
  6. Select Disable sync when.
  7. Choose the desired battery level.

Perform the following steps (for example on Nokia 5230 device):

  1. Select Menu key.
  2. Select Applications.
  3. Select Email.
  4. Select Options.
  5. Select Tools > Settings
  6. Select When to sync.
  7. Select Disable sync when.
  8. Choose the desired battery level.