Genuine Dyson V8 Mains charger UK Plug

When would this part need replacing?
-When it is damaged
-When the charging light does not appear on the plug and the battery is low, also if the charger is not warm when plugged in and switched on.
-When you need a spare

Fits The following V8 models:

Dyson V8 Total Clean vacuum
Dyson V8 Absolute Pro
Dyson V8 Absolute vacuum

Genuine Dyson V8 charger UK plug 230V 967813-01