Most glow drivers have a rechargeable nicad battery in them which does need to be charged and then recharged periodically. There are chargers made just for that purpose; the charger plugs right into the glow driver like a glow plug does. This is the kind of charger that you should use. You can get, however, glow drivers which use a standard alkaline battery so that no charging is necessary. When the battery is discharged, you simply replace it.